Rør, hvis du tør



Re: Rør, hvis du tør - ampsandsound

Indlægaf kvik » 10. nov 2015, 02:51

Ampsandsound Kenzie ($1900)

Ampsandsound Kenzie.jpg
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Like many of our products, the Kenzie headphone amplifier evolved from our earlier designs – in this case, rave reviews about the SE-84’s headphone section. The inevitable question followed; why didn’t we build a dedicated headphone amp?

Why indeed?

After some research, we came to the conclusion that a headphone amplifier building on the much loved Darling circuit was the right choice for us. The outstanding performance of the Kenzie headphone amplifier is made possible with custom wound ultra-high quality output transformers providing amazing frequency extension.

The Kenzie does not use a voltage network, and has more than enough power to drive even the most difficult headphones. We chose 32 ohms and 600-ohm output taps to allow use with the widest variety of headphones; everything from Grado Labs, HiFiMan, Audeze, MrSpeakers, Sennheiser, and Beyerdynamic.

The Kenzie showcases the transformers on the chassis to frame in the unique 1626 single-ended tubes. We have included an ALPS volume pot to allow attenuation and simplify the signal path.

The Kenzie is one of the sweetest-sounding headphone amplifiers on the market. The 1626 is commonly referred to as the “Poor Man’s 300B”; offering a similar level of warmth, texture, and soundstage depth.

The 1626 is a WWII-era tube that was used as a transmitter tube in radar installations. The design is shy on pure output, but offers layers of texture and drive, and is paired with a massive choke and robust output transformers for ultra-quiet operation. As with all of our products, parts selection was crucial during this build and each chosen not for price, but for best quality and synergy.


Supplied Tubes:
Input tube: 12SL7 or equivalent
Output tubes: 1626 or VT-137

Cathode Bias/automatic bias allows for easy tube changes without adjustment.

Compatible with 32 ohm-300 ohm headphones using the 32 ohm 1/4″ jack.
Headphones above 300 ohms will benefit from using the 600 ohm 1/4″ jack.

Headphones driven successfully or tested with the amp include, MrSpeakers Ethers, MrSpeakers Ether Cs, Audeze LCD-2.2F, Audeze LCD-XC, AKG240, AKG701, Sony MDRV6, Sennheiser HD650, Sennheiser HD800, Beyerdynamic T1-600 ohm, HIFIMAN HE400i, HIFIMAN HE-400, HE-400S, Grado Labs SR-60, RS1i

The Kenzie is handmade in Southern California with U.S.-sourced parts and custom hand-wound output transformers.

Available as 8ohm/32ohm, 16ohm/32ohm, 32ohm/300, or 32ohm/600ohm outputs.
Please email preferred output impedance or default with be 32ohm/600ohm output

Specifications:
Input impedance is 10K ohm with alps pot
Input Sensativity 520mV peek for full power out.

32ohm power: 200mWatts RMS @ 1khz
Frequency bandwidth 20hz -3db to 12khz -3db full power
Frequency bandwidth 20hz -3db to 18khz -3db @ 160mw output
Noise on 32ohm tapp @ 500uV

600ohm power: 250mWatts RMS @ 1khz
Frequency bandwidth 20hz -1db to 18khz -3db full power
Noise on 600ohm tapp @ 1.4mV

https://ampsandsound.com/products/kenzie-headphone-amp



Ampsandsound Encore ($2600)

Ampsandsound Encore.jpg
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Like many of our products, the Encore headphone amplifier/pre-evolved from our earlier designs – in this case… it came from the feedback regarding the Kenzie Headphone amp. As well thought out as the Kenize was, we didn’t know the features that most resonated with the personal audio community. To answer the call given, the Encore, grew in size and features while remaining true to the original Darling circuit.

The Encore is meant to provide the most common request; move the headphone jacks up front. By moving the headphone jacks, we were able to squeeze in 2 inputs and 1 variable out to be used as a preamp.

The Encore went from being a single ended triode without feedback to including a transformer coupled output cable of driving long cable runs without issue.

The Encore continues without a voltage network, and has more than enough power to drive even the most difficult headphones. With 32 ohms and 600-ohm output taps to allow use with the widest variety of headphones.

The Encore mutes the pre-out function when headphones are introduced for a true monitoring experience. We have continued to use an ALPS volume pot to allow attenuation and simplify the signal path.

The Encore is one of the sweetest-sounding headphone amplifiers on the market. The 1626 is commonly referred to as the “Poor Man’s 300B”. The Encore expands on this by bringing the same tonal balance and sonic signature to power amps in a 2ch system. By coupling the Encore as the pre, you can breath new life into SS powerhouse amps.

The heart of the Encore is the 1626 triode which is a WWII-era transmitter tube in radar installations. The design is shy on pure output, but offers layers of texture and drive. We have paired the 1626 power tubes with custom transformer made specifically for use by a US partner. The Kenzie Encore's massive choke provides increased DC power filtering increase from 1.5H to 8H with sonic dividends. The output transformers are only ½  of the magic. They account for the wide and flat frequency response. The other ½ is the option of including input transformers. Input transformers help clean up incoming signals which may have sonic garbage and help to add definition and slam. The Encore can be optioned as a base model without input transformers or couple cap upgrades or with either of this upgrades selected. Each upgrade provides a tangible improvement to an already fantastic sound.


Supplied Tubes:
Input tube: 12SL7 or equivalent
Output tubes: 1626 or VT-137

Cathode Bias/automatic bias allows for easy tube changes without adjustment.
Compatible with 32 ohm-300 ohm headphones using the 32 ohm 1/4″ jack.
Headphones above 300 ohms will benefit from using the 600 ohm 1/4″ jack.

Headphones driven successfully or tested with the amp include, MrSpeakers Ethers, MrSpeakers Ether Cs, Audeze LCD-2.2F, Audeze LCD-XC, AKG240, AKG701, Sony MDRV6, Sennheiser HD650, Sennheiser HD800, Beyerdynamic T1-600 ohm, HIFIMAN HE400i, HIFIMAN HE-400, HE-400S, Grado Labs SR-60, RS1i

The Kenzie Encore is handmade in Southern California with custom hand-wound output transformers and U.S. sourced parts.

Available as 8ohm/32ohm, 16ohm/32ohm, 32ohm/300, or 32ohm/600ohm outputs.

Specifications:
Input impedance is 10K ohm with Alps pot
Input Sensitivity 680mV peek for full power out.

32ohm power: 230mWatts RMS @ 1khz
Frequency bandwidth 20hz -3db to 12khz -3db full power
Frequency bandwidth 20hz -3db to 18khz -3db @ 160mw output
Noise on 32ohm tap @ 500uV

600ohm power: 326mWatts RMS @ 1khz
Frequency bandwidth 20hz -1db to 18khz -3db full power
Noise on 600ohm tapp @ 1.2mV

https://ampsandsound.com/products/kenzi ... dphone-amp



Ampsandsound Mogwai Special Edition ($3200)

Ampsandsound Mogwai SE.jpg
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Like many of our products, the Mogwai evolved from our earlier designs, borrowing from the Bigger Ben and Classic Wonder, while embracing the form factor of the Kenzie. The Mogwai offers more than an entry point for tube amps, but a hybrid product, meant for both headphone and loudspeaker use.

Our circuit offers the ability to roll a wide variety of tubes inexpensively and bring increased power to headphones without any sacrifice of design choices that conflict with our values.

The Mogwai combines the features of a full-sized two-channel power amplifier and headphone amplifier in a chassis that is suitable for a desktop use.

The Mogwai utilizes single-ended Class A operation with zero feedback to provide the essence of our Classic Wonder sound; strictly old school SET sound, without having to spend hundreds if not thousands of dollars on tubes.

The performance of the Mogwai is made possible with custom wound ultra-high quality output transformers from Transcendar, which provide excellent frequency extension and a flat response.
The Mogwai does not use a voltage divider network, but depends on transformers instead. We chose a 32 ohm tap for headphones to offer a dedicated selection for the widest range of headphones, and an 8-ohm loudspeaker tap to connect the Mogwai to moderately efficient loudspeakers.

The Mogwai displays its transformers prominently on the chassis to frame in the tube compliment, which can vary from a 6L6GC to a KT88.

Volume control is handled by the ALPS volume pot to allow attenuation and simplify the signal path. Zero feedback on the outputs negates the need for a pre-amplifier; an iPhone can drive the Mogwai without issue.

The Mogwai differs from the Kenzie as it aims to provide powerful output while remaining true to classic tube design. As with all ampsandsound products, we strive for a neutral, non-fatiguing sound, and demand that all our products be ultra-quiet in operation. Quiet operation is not just a goal but a guiding principle that shapes all design and implementation choices.


Tube Selection:
Input tube: 6SL7 or equivalent
Output tubes: 6L6GC, EL34s, KT66, KT77, KT88, 6550s and KT90s
A personal favorite is the Tungsol 6L6GC STR. Warm, strong and tight bass.
Cathode Bias/automatic bias allows for easy tube changes without adjustment.

Compatible with 32ohm-300ohm headphones using the “32ohm” 1/4″ jack.
Available as 16ohm/32ohm, 32ohm/300ohm, or 32ohm/600ohm outputs
Please email preferred output impedance or default will be 32ohm/600ohm output

Recommended Headphones:
Headphones driven successfully or tested with the amp include, MrSpeakers Ethers, MrSpeakers Ether Cs, Audeze LCD-2.2F, Audeze LCD-XC, AKG240, AKG701, Sony MDRV6, Sennheiser HD650, Sennheiser HD800, Beyerdynamic T1-32ohm, HIFIMAN HE400i, HIFIMAN HE-400S, HIFIMAN HE-400

The Mogwai is handmade with pride in Southern California with US-sourced parts, including our precision transformers.

Specs:
Input impedance is 10K ohm with Alps pot, .5v for full power.
Input Sensitivity 800mV peek for full power out.

32ohm power: 1.8watts RMS @ 1khz, 7.6VRMS
Frequency bandwidth 20hz -1db to 20khz -3db @ 500mw output
Frequency bandwidth 20hz -1db to 14khz -3db full power
Noise on 32ohm tapp @ 580uV

8ohm power: 3watts RMS @ 1khz, 4.7VRMS
Frequency bandwidth 20hzhz -3db to 17khz -3db @ 2watts
Noise on 32ohm tapp @ 340uV

https://ampsandsound.com/products/mogwa ... al-edition



Ampsandsound Kenzie Mono ($5500)

Ampsandsound Kenzie Mono.jpg
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The Kenzie Monos came about from a brainstorming session. We were looking to keep the tone of the Kenzie which is warm, musical and detailed with the flexibility of the Mogwai SE and its Tonal weight. Additionally we wanted to showcase our technical prowess, as we consider turret boards to be the highest art.

The Kenzie Monos are a 2 chassis solution, isolating each channel to its own amp. The amps employ a new power transformer with provision for tube rectification from a 6CA4 rectifier.

The power supply is robust and utilized choke regulation.

We opted to use the ubiquitous 5751 allowing for the widest range of tube rolling options.

Output tube is the 1626 WWII transmitter triode or can be ordered for the 12B4 triode which will increase power by 40%. The goal of the Kenzie mono is to allow for a wide range of NOS tube rolling; old tube do it better.

The Kenzie Mono is one of the sweetest-sounding headphone amplifiers on the market yet brings you closer to the music, going from the 10throw to the orcastra. The 1626 is commonly referred to as the “Poor Man’s 300B”; offering a similar level of warmth, texture, and soundstage depth.

Outputs are ¼” mono jacks for 8ohm, 32ohm and 300ohm as well as binding posts for use as a 2chanel mono block amp.

The build quality of the Kenzie monos is Jewel like, though you will likely never see the effort which went into its production, turret boards predate PCBs and provide the greatest flexibility while providing a rigid mounting point. Turret boards were used in some of the greatest amplifiers made from Mcintosh and HarmonKardon and today ampsandsound made use as well.

Input attenuation/Volume is handled by a 10K mono stepped attenuator for precise channel matching.

The Kenzie Monos are SET Single Ended Triode with no feedback. Output is directly coupled to the transformer, no voltage divider network to degrade the sound. The Kenzie Monos have more than enough power to drive even the most difficult headphones. We chose 8ohm, 32ohms and 300ohm output taps to allow use with the widest variety of headphones; everything from Grado Labs, HiFiMan, Audeze, MrSpeakers, Sennheiser, and Beyerdynamic.

Cathode Bias/automatic bias allows for easy tube changes without adjustment.

Includes a Mono ¼” to Stereo ¼” cable to allow immediate use


Supplied Tubes:
Input tube: 5751
Rectifier: 6CA4
Output tubes: 1626 or VT-137

Headphones driven successfully or tested with the amp include, MrSpeakers Ethers, MrSpeakers Ether Cs, Audeze LCD-2.2F, Audeze LCD-XC, AKG240, AKG701, Sony MDRV6, Sennheiser HD650, Sennheiser HD800, Beyerdynamic T1-600 ohm, HIFIMAN HE400i, HIFIMAN HE-400, HE-400S, Grado Labs SR-60, RS1i

The Kenzie is handmade in Southern California with U.S.-sourced parts and custom hand-wound output transformers.

Specifications:
Input impedance is 10K ohm with alps pot
Input Sensativity 970mV peek for full power out.

8ohm power: 400mWatts RMS @ 1khz
Frequency bandwidth 20hz -1db to 23khz -3db
Noise on 8ohm tapp @ 470uV

32ohm power: 300mWatts RMS @ 1khz
Noise on 32ohm tapp @ 550uV

300ohm power: 350mWatts RMS @ 1khz
Noise on 32ohm tapp @ 1.5mV RMS @ 1khz

https://ampsandsound.com/products/kenzie-mono
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Re: Rør, hvis du tør - VinylSavor

Indlægaf kvik » 10. nov 2015, 02:53

VinylSavor E55L Headphone Amplifier - Variant A

VinylSavor E55L-A.jpg
VinylSavor E55L-A.jpg (369.89 KiB) Vist 10423 gange

In most cases my line preamplifiers can drive headphones without any problem. But certain headphones with 32 Ohms impedance are a too heavy load for a preamp. Typically they are too sensitive to be connected to a power amp, even if it is a flea power single ended one. So in such cases a dedicated headphone amp which acts as buffer after the preamp is the ticket.

This is how the E55L single ended headphone amp was born. It is meant to drive the Grado RS1 which is very sensitive (1mW for 96dB SPL) and has a 32 Ohms impedance.  The E55L triode connected delivers more than enough power for that and has just the right gain. So the amp can be kept rather simple with just a single E55L stage per channel.

The circuit follows my usual approach in power amps. Output transformers are Hashimoto. The E55L runs at a moderate 30mA. The power supply is tube rectified with a 6BY5 augmented with UF1007 diodes to create a full wave bridge. Several LC filter stages after rectification. This guarantees a hum free operation even with these sensitive headphones.

There are 3 outputs connected to the 4, 8 and 16 Ohm taps of the output transformers. The headphones work on either of them. Selecting different output provides some additional gain control.


http://vinylsavor.blogspot.no/2015/04/t ... r.html?m=1



VinylSavor E55L Headphone Amplifier - Variant B

VinylSavor E55L-B.jpg
VinylSavor E55L-B.jpg (359.62 KiB) Vist 10423 gange

Last month I showed the first headphone amp I ever built. That one was meant to be used with a preamplifier, hence it did not have input selector or volume control. This month I finished another version of that, this time with input selector switch and a volume attenuator at the input so sources can be connected directly to it.

It is based on the same circuit and component selection as the previous one, just with the selector added and a resistive ladder type volume control.

While the previous one had all the taps of the output transformers brought out to individual jacks, this only uses one of them to make room for the control switches.

Output tubes are triode wired E55L and the rectifier is the 6BY5.


http://vinylsavor.blogspot.no/2015/05/t ... 2.html?m=1



VinylSavor - Designer and Manufacturer of audio amplifiers. All designs are available completely assembled and most also as kits.

https://www.vinylsavor.com
http://www.monoandstereo.com/2014/12/in ... r.html?m=1
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Re: Rør, hvis du tør - Unison Research

Indlægaf kvik » 20. nov 2015, 10:07

Unison Research SH (£1250)

Unison Research SH.jpg
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Class A Valve Headphone Amplifier

Unison Research’s unrivalled ability with Single-Ended valve designs is well known around the world. The SH is the company’s first headphone amplifier to benefit from such extensive knowledge and ability.

The SH uses a Single-Ended Class A design with only two stages and a passive volume control. The classic refinement of the valves combines with modern technology found in the internal USB DAC to produce something truly stunning.



Specifications:
• Maximum output voltage (THD 1%) : output "High sensibility" 0.5 V/150 ohm, 0.45 V/33 ohm, 0.4 V/10 ohm output "Low sensibility" 1.5 V/150 ohm, 1.2 V/33 ohm, 0.65 V/10 ohm
• Frequency Response: -0.1 dB @ 10Hz / 3-dB @ 50 kHz (output "Low sensibility", 33 ohm load)
• Input impedance: 20 kohm // 100 pF
• Sensibility: 0.67 V in/ 0.33 V out (output "High sensibility", 10 ohm load)
0.67 V in / 1 V out (output "Low sensibility",33 ohm load)
• Input stage: Pure Class A, ECC83/12AX7
• Output stage: Class A, EL84 triode connected
• Inputs: 1 line RCA, 1 USB
• Outputs : 2 (parallel connected)
• Feedback factor: 16 dB
• THD: < 0.2% @ 1kHz, 0.5V, <0.8% up to 1 V (output "Low sens.", 33 ohm load)
• Absorption: 45 W
• Dimension: 22,5 x 12,6 x 32,2 cm
• Weight: 6 kg

USB DAC:

• Asynchronous USB interface compliant to USB 2.0 Audio Class

• Accepts PCM up to 384kHz and DSD up to 128x

• Resolution up to 32 bits

• Last generation ESS Sabre DAC with jitter eliminator circuit

• Galvanic isolation between USB interface and conversion circuit

• Low phase noise clocks which reside in the “clean” supply domain to preserve low jitter performance

• 110dB SNR (@ 1kHz, “A” weighted, 192kHZ) 0.008% THD+N (@ 1kHz, -3dBFS)


http://unisonresearch.com/en/products/v ... rs/sh.html
http://www.head-fi.org/t/777037/unison- ... -amplifier
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Re: Rør, hvis du tør - Lector Strumenti Audio

Indlægaf kvik » 20. nov 2015, 21:28

Lector ZUM-H (€?)

Lector ZUM-H.jpg
Lector ZUM-H.jpg (79.74 KiB) Vist 1945 gange

All new design for this outstanding hybrid headphone amplifier. Tube triode input and lateral mosfet output buffer. Tube circuit is built around our exclusive optical bias cathode control. Four independent power supply sections for ultra low noise. All circuits from input to output are in pure class A. High quality components selection and large value capacitance reservoir for mosfet output. The Lector ZUM-H can drive any type of headphones from low to high impedance. User selectable high or low power headphone output. Remote control handset for volume control.

Specifications
• Driver Tube: 12BH7A (optionally ECC802S)
• Inputs: Line In (x5)
• Outputs: Tape Out (x2), Pre Out, Headphone Jack 6.3mm
• Chassis: Cherry wood or black plexi panels. Spiked feet (x3) are optional
• AC Mains: 240 110 100 Vac 50/60 Hz 70 V/A
• Dimensions: 400 (L) / 440 (L with panels) x 300 (D) x 85 (H) mm
• Weight: 7 Kg net, gross 8 Kg

http://www.lector-audio.com
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Re: Rør, hvis du tør - UltraSonic Studios

Indlægaf kvik » 31. dec 2015, 14:20

UltraSonic Studios Oblivion ($1450)

UltraSonic Studios Oblivion.jpg
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Introduction

True & ideal hybrid amp. True Implementation of Tubes for voltage, and solid state for current. Truly modern design choices of mating circuit designs like CCS & Gyrators effectively to reducing parasitics to the point where component quality does not interfere with, or become a factor for optimal sound(!) That perspective is a huge game changer in itself.

Gone are the old-school tube designs of which mostly ALL of current tube amps are still using which are ancient, old, and non-creative. Gone are the days of heavy expensive output transformers and huge expensive capacitors. Gone are the headaches of worrying about super expensive parts quality upgrades. Gone are the aggravation of expense in endless tube rolling to find the best match for the amps with expensive tubes!

What I am saying is that this ideal modern mating of Solid state and tube is a game changer not because of what it uses, but because of how it is implemented. Thanks to MrCurwen for both the design and the unique perspective of design choices, we have a resolving amp with high transient speed and high END GAME level transparency, due to reduction of parasitics and component choices which use parts to their best design parameters.

You see I slipped in the word "end-game". This term is not easily thrown around and so you now already have an idea at what level we are playing here. This is not just another tube amp, or just another hybrid amp using two amplification devices as a "novelty". This amp to me, defines the proper use of the term hybrid amp and finally gets it right. No dumb leds or special circuits thrown in, just for novelty to impress. Only the music produced is what is meant to impress.


Topology

The topology of Oblivion is transformer coupled (parafeed) balanced amp with open loop (no NFB). SE input stage with balanced CCS loaded source followers that drives the output tube grids. The grid drivers relieves the input tubes of any drive duty. Tubes do voltage amplification and FET’s supply current. Tubes do what they do best and FETs do what they do best.

The LTP output stage is force balanced through the CCS tail. All tube anodes are gyrator loaded. Regulated B+ and B- so the voltage doesn’t fluctuate with the signal.

Since Oblivion is open loop (zero NFB) and constant current draw it recovers extremely quick after high transient peaks. That why there's no need for many watts of headroom with this topology like in many other amps with cathode bias and NFB.

Input tubes are 6AT6’s, output tubes are EL81’s


Versions

The amplifier is available in two versions..

Oblivion: SE input stage (RCA input) and balanced LTP output stage
Citadel: LTP input stage (XLR input) and LTP output stage.

The main difference is the input stage. Both amps will have regulated B+ and B-, gyrator plate loads, CCS tails (Oblivion only in output stage as input stage use grid bias).

Citadel will rule out any “imperfections” the SE input stage brings. Those “imperfections” may not be bad though, that’s up to the listener and personal preference. Citadel will sound cleaner than Oblivion.

Both amps will have optional speaker outputs.

Price for Oblivion is $1450 and $1600 with speaker outputs.
Citadel cost $400 more. So, $1850 stock or $2000 with speaker outputs




https://www.head-fi.org/threads/oblivio ... os.902926/
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Re: Rør, hvis du tør - Aleks Audio

Indlægaf kvik » 5. apr 2016, 22:46

Aleks Audio Headphone Amplifier ($1360)

Aleks Audio Headphone Amplifier.jpg
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New 2017 high-end vacuum tube headphone amplifier.

Features
• The ability to connect one or two pairs of headphones at the same time.
• There is a possibility to switch headphone with different resistance from 20 up to 800 Ohm.
• Output transformers in german iron.
• Switching operation modes of the output triode/pentode lamps.
• To adjust the volume as desired with remote.

Specifications
• Tubes: 3 pcs
• Harmonic distortion: 0.05% < (1 kHz, 1W)
• Signal/noise ratio (no noise): /90dB
• Frequency range 5-80000 Hz
• Inputs: 3x RCA, 1x XLR
• Power consumption: 200 W
• Mains power: AC 230V-50 Hz
• Dimensions (WxHxD): 440 x 80 x 285 mm
• Weight: <10 kg

http://www.aleksaudio.ru/aleksaudio_ru/ ... phone.html
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Re: Rør, hvis du tør - Sonnare Audio

Indlægaf kvik » 5. apr 2016, 22:57

Sonnare The Emotion ($1795)

Sonnare Audio The Emotion.jpg
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4P1L D.H.T.  S.E. headphone amplifier

The Emotion is Sonnare Audio’s first commercial product. It is the culmination more than 20 years of research by Founder Daniel Cheever, MSEE, The designs’ topology has its roots in the Research work Daniel spent throughout a 7 year effort on this 2001 Masters Thesis “A NEW METHODOLOGY FOR AUDIO FREQUENCY POWER AMPLIFIER TESTING BASED ON PSYCHOACOUSTIC DATA THAT BETTER CORRELATES WITH SOUND QUALITY”. Indeed the roots of this type of circuit topology sprang from even earlier investigations into the unique and astounding sound qualities of single ended triode amplifiers. These amplifiers measure questionable “FTC THD” but sound sublimely musical.

The EMOTION will drive all Planar Magnetic or Dynamic Headphones. The output is transformer coupled with a custom gapped transformer wound in U.S.A. The 8ohm output tap is used. For higher impedance headphones the reflected impedance back to the tube is raised and thus the peak output voltage significantly exceeds the capabilities of solid state amplifiers of similar output power. The amplifier takes advantage of the lowest distortion power amplifying device known, of any age, any technology: the Soviet 4P1L. Each is configured single-ended as a Directly Heated Triode. These tubes are available in large quantities and are the darling of the Russian and German low powered amplifier craze.

The distortion profile at all drive levels contains only 0.2 % 2nd harmonic distortion, with the 3rd harmonic at ~~ 0.05%, masked by the 2nd. Most importantly the balance between these harmonics does not change in ratio dynamically.  Sonnare believes the alarming sound clarity is unique because of the use these ultra-low distortion devices connected in a unique, patent-pending topology, NOT in spite of circuit simplicity or the use of vacuum tubes.



I/O
Front Panel
• Volume knob
• Power switch
• Power On indicator
• A PAIR ¼ stereo headphone jacks
• Mini XLR. Balanced Stereo
• “staging” adjust , each channel, with ammeter
 
Rear Panel
• IEC power input jack. 120VAC 50-60Hz
• (2) RCA input jacks
• 9pin DIN jack for expansion to other Sonnare products. Coming soon!

Tube Complement
• 2x 4P1L
Directly heated pentode. Connected as 100% triode. From Soviet Fighter Jet. Hermetically sealed pins. Loctal Base. Will exceed 2000Hrs.
 
• 2x 7N7 or 2x 6SN7
This tube is widely available N.O.S. and is the final version of the low mu 6SN7GT. It is the identical structure as this venerated low-mu dual triode in a stronger glass envelope with significantly better vacuum sealed pins.


http://www.sonnare.com
https://hifilowlight.blogspot.com/2018/ ... art-2.html
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Re: Rør, hvis du tør - Air Tight

Indlægaf kvik » 5. apr 2016, 23:14

Acoustic Masterpiece AM-201H (€3350)

Acoustic Masterpiece AM-201H.jpg
Acoustic Masterpiece AM-201H.jpg (273.37 KiB) Vist 2914 gange

The AM-201 is back on the front of the stage! Two years after the discontinuation of the very famous AM-201, Air Tight decided to breathe new life into its "entry-level" Integrated Amplifier under the name of AM-201H. While taking up the same basis, the AM-201H integrates components superior to its predecessor, and a high quality full metal chassis. It delivers the musicality, the heat and transparency clean the reputation of Air Tight and its founder Mr. Miura, in addition to very large so exceptional Dynamics for electronic tubes. Another little novelty, the AM-201H offers a headphone jack on the front.

Features
• Pure, transparent sound with the renowned AIR-TIGHT musicality derived from our time-tested valve technology.
• Useful auto-bias system for safe and reliable operation under parallel push-pull configuration.
• 100% hand-elaborated, point-to-point, PCB-free wiring for stable, long-life performance.
• Luxurious cosmetics featuring thick aluminium extruded front & rear panels, bias balance meter.
• Headphones Output

Specifications
• Output power: 22W+22W, 4Ω/8Ω (rms)
• Valves employed: EL84(6BQ5/6P14)x8, 12AX7x1, 12AU7x2
• Input impedance: 100kΩ
• Output impedance: 4Ω, 8Ω
• THD: 1%(1kHz)
• Frequency response: 20~25kHz
• Input sensitivity: 230mV
• S/N ratio: 90dB
• Dimensions: 358(W) x 295(D) x 173(H)mm
• Weight: 15kg

http://www.airtight-anm.com/components/am201h.html
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Re: Rør, hvis du tør - Weston Acoustics

Indlægaf kvik » 5. apr 2016, 23:24

Weston Acoustics Touchstone Preamplifier (AUD$2500)

Weston Touchstone Preamplifier.jpg
Weston Touchstone Preamplifier.jpg (123.63 KiB) Vist 1152 gange

The touchstone active "output-transformer-volume-control" uses a directly coupled 6SN7 driving a stepped output transformer to give the clarity of a TVC, with exceptional drive capabilities. Very low output impedance means it can even drive a pair of sensitive speakers.  No capacitors in the signal path.

Specifications
• Max Voltage Output: 5 volts rms. 14 volts peak

• Frequency response: 6hz to >50khz

• Separation: >55db

• Signal to Noise: >88db A Weighted

• Signal to Hum: >68db

• Distortion: <0.05% at 0.5 volt rms output

• Hum Level: <0.1 millivolt

• Gain: 6db

• Inputs: 4
• Outputs: 2 - optional 1/4" headphone output (rec 100 ohm minimum load)

Optional
• Remote volume option $475
• Birdseye Maple plinth $250


http://www.westonacoustics.com/page0071.html



Weston Acoustics Time Machine Preamplifer ($AUD$3000)

Weston Time Machine Preamplifier.jpg
Weston Time Machine Preamplifier.jpg (76.84 KiB) Vist 1152 gange

Time Machine 2A3 / 45 Preamplifier / Headphone amplifier / Amplifier

Including headphone out and speaker output, and also including bent metal remote volume control. Supplied with Shuguang 2A3C, Philips NOS small signal tubes (while stocks last), and Shuguang 5U4g rectifier tube.



Specifications as Preamplifier / Headphone amplifier
• Gain: 12db (5db when using 6SN7)
• Frequency response: 15hz to >50khz
• Separation: >55db
• Signal to Noise: >92db A Weighted
• Signal to Hum: >80db below signal at all output levels
• Distortion: <0.05% at 0.5 volt rms output
• Hum Level: <0.1 millivolt
• Output impedance: <10.0 ohm
• Inputs: 4

Specifications as Amplifier
• Power Output: 2 watts per channel (3.5 for 2A3)
• Frequency response: -3db - 15hz to >30khz
• Separation: >55db
• Signal to Noise: >94db
• Signal to Hum: >78db
• Distortion: < 0.2% at 0.5 watt
• Hum Level: < 1.0millivolt
• Sensitivity: 700mV
• Inputs: 4
• Speaker output: 8 ohm (6 to 12ohm)
• Damping factor: >4.0 20hz to 20khz 8 ohms

• Weight: ~20kg (~44lb)


http://www.westonacoustics.com/page1005.html
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Re: Rør, hvis du tør - Thöress

Indlægaf kvik » 6. apr 2016, 00:09

Thöress Dual Function Preamplifier (€9600)

Thöress Dual Function Preamplifier.jpg
Thöress Dual Function Preamplifier.jpg (180.74 KiB) Vist 3129 gange

INTRODUCTION

THÖRESS announces the introduction of a very special reference preamplifier...

The Dual Function Reference Preamplifier has just been released after a most extensive development period and represents an ultimate implementation of both a reference class line control preamplifier and a reference headphone driving amplifier for dynamic and planar headphones of all types. The Dual Function Reference Preamplifier offers the utmost in sonic performance as well as maximum operational versatility in both operating modes.

The new Reference will easily meet the highest expectations of the most discerning and critical music enthusiasts. It is an “ ultimate “ component in every sense and the perfect complementary preamplifier to partner with the Thoeress Parametric Phono Equalizer (Phono Enhancer).


DESCRIPTION & FEATURES

The Dual Function Reference features 6 line level inputs, 3 line outputs, 2 headphone outputs (toggle selectable) and a custom designed remote volume control presented with typical Thoeress style and attention to detail.

Thoeress has also implemented a unique sensitivity control with on-the-fly adjustment of the preamplifier’s gain via a six position rotary dial in order to match various amplifier, speaker and overall system sensitivities. Three of the six positions allow for subtle tone control functions which are very useful for equalizing the tonality of headphones as well as restoring tonal imperfections of the musical program iteself. The sixth position of the switch also implements a loudness compensation feature where bass and treble frequencies are subtly boosted in order to compensate for the hearing perception of the human ear at low listening levels (under low volume level conditions, human hearing does not perceive bass and treble frequencies as readily as with average or higher volume levels).


DESIGN PHILOSOPHY

The new Reference Preamplifier has been designed and developed inaccordance with the usual puristic design principles common to all Thoeress products.

Both the line control preamplifier and headphone amplifier functions of the Reference are performed by the same minimalistic circuitry which is based on a unique single ended zero- feedback topology. Despite the complete absence of any negative feedback, the Reference offers extremely low output impedance which provides the line control section with an outstanding ability to drive difficult amplifier loads and long cable runs. The ultra low output impedance characteristic is also ideal for driving all types of dynamic and planar headphones with impedances as low as 30 ohms or even lower.

Electrostatic headphones present unique electrical requirements that in our opinion are best handled by a dedicated amplifier specifically designed for that purpose. In that regard, Thoeress will be introducing such a dedicated device in the future.

The tone control feature of the Reference has been implemented in a simple yet most ingenious manner without the aid of any form of clumsy (and sound degrading) conventional tone control circuitry. It is highly effective and in complete accordance with our puristic design approach.

As with all Thoeress products, the Reference is built with meticulous hand construction using our proven point-to-point hard wiring techniques. An in-house designed and built power transformer is utilized and select components are incorporated to assure outstanding sonics and reliable performance for many years to come.



FEATURES & SPECIFICATIONS

• Dual Function Reference Preamplifier.
• 6 line level inputs selectable via rotary switch.
• 3 line outputs.
• 2 headphone outputs selectable via toggle switch.
• Remote volume control with ultra high precision motor driven potentiometer providing better than 0.5db channel balance.
• Gain / sensitivity adjustment providing on-the-fly control via rotary switch.
• Remote volume control with ultra high precision potentiometer providing better than 0.5db channel balance.
• Fine tone control feature for equalization purposes.
• Zero feedback operation.
• Full hand construction and point-to-point wiring throughout.
• Standard 230Vac / 115Vac, customizable for 100Vac (Japan), 220Vac (South-Korea, Thailand), 245Vac (Australia).
• Dimensions & weight: 134 x 434 x 434 mm /10Kg.
• Tube Complement: Two NOS tubes per channel - United Electron 12HG7 / 12GN7 triode pentode and RCA Radiotron Electron Tube 6J5 triode with octal pedestal


http://www.thoeress.com/en/
http://highfidelity.pl/@main-793&lang=en
http://gpoint-audio.com/thoress-launche ... 2017-show/
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Re: Rør, hvis du tør

Indlægaf kvik » 6. apr 2016, 00:09

Reserved..
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Re: Rør, hvis du tør - Nagra Audio

Indlægaf kvik » 6. apr 2016, 00:26

Nagra Classic Preamp (€15500)

Nagra Classic Preamp.jpg
Nagra Classic Preamp.jpg (141.95 KiB) Vist 730 gange

Class A tube stereo preamplifier

Nagra’s engineers have taken as a starting point the critically acclaimed Nagra JAZZ preamplifier and, incorporating elements of the design philosophy that characterises the HD DAC, have created a preamplifier that delivers even more performance and musicality for an exceptional listening experience.

The CLASSIC PREAMP is the ideal partner for the Nagra CLASSIC AMP and CLASSIC DAC.


FEATURES

DESIGN
• Extended chassis common to the CLASSIC range allows a greater number of components to be used compared to the Nagra JAZZ. This allows greater filtering of the internal power supplies for an improved listening experience. This design philosophy was first seen on the HD DAC and inspires the entire CLASSIC range.

ELECTRONICS
• Bespoke polypropylene capacitors created especially for the CLASSIC PREAMP are used for decoupling and interstage to deliver exceptional performance.
• Wide frequency response and linear phase response provided by no-compromise design and high quality custom-made components.
• Separate multiple ultra low-noise right and left channel power supplies create a larger and more realistic soundstage.
• High-quality headphones amplifier circuit is the same as that employed by the Nagra HD DAC.

CONNECTIVITY
• 1 x XLR and 4 x RCA inputs enable the CLASSIC PREAMP to be connected to a variety of sources.
• 2 x XLR and 1 x RCA outputs allow the CLASSIC PREAMP to be connected to two power amps if required for a monobloc solution.
• A true bypass XLR connector allows the machine to be hooked up to a high-end home cinema to benefit from a power amp downstream and provide a neat cabling solution.
• Optional input and output transformers are available separately to create a fully symmetrical floating signal that will further enhance performance. These transformers are hand-wound in-house by Nagra in order to meeting the exacting standards of the design brief.

POWER SUPPLY
• On-board internal power-supply allows direct connection to the mains, a feature shared with the CLASSIC DAC. This solution, which obviates the need for the external Nagra ACPS II power supply delivered separately with other Nagra units nonetheless produces superior performance. Should the customer desire, the CLASSIC PREAMP can be powered by Nagra’s dedicated MPS power supply via the 12 V DC Lemo connector on the rear panel to provide additional performance gains.

USER-FRIENDLY DESIGN
• Front panel with LCD screen, similar to the Nagra CLASSIC DAC so that each input can be named. An intuitive menu allows access to custom settings as well as operating time. All functions are accessible via a provided remote.
• Traditional Nagra Modulometer showing the output level.
• Output gain is switchable between 0 and 12 dB via a switch on the front panel to achieve optimal gain whatever the nature of the source.
• Same dimensions as the other elements in the Nagra CLASSIC range allowing for neat and aesthetic stacking in the building of a complete Nagra system from various components.



SPECIFICATIONS

ELECTRONICS
• Frequency response: 10 Hz – 50 kHz (+0 / -0.5 dB)
• Dynamic range: >125 dB (Gain at +12 dB)
• Minimum input level to reach 0 dB (meter): 0.28 V rms (Gain at +12 dB)
• Maximum input level to reach 0 dB (meter): >25 V rms (Gain at 0 dB)
• Crosstalk: >85 dB
• Total harmonic distortion (THD): <0.01% at 1 kHz out, no load
• Input impedance: 50 KΩ
• Output impedance: 6 Ω
• Vacuum tubes (selected by Nagra Laboratory): 2x 12AX7 / ECC83, 1x 12AT7 / ECC81
• Power consumption: 12 V 1040 mA, < 1o mW in standby
• Power supply: 115 V or 230 V AC input

CONNECTIONS
• Inputs: XLR, RCA 1 to 4
• Outputs: 2 x XLR, 1 x RCA

GENERAL
• Dimensions: 379 x 277 x 76mm (12.2 x 10 x 3 inches)
• Weight: 4.9 Kg (10.8 lbs)


https://www.nagraaudio.com/product/classic-preamp/
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Re: Rør, hvis du tør - Rogers High-Fidelity

Indlægaf kvik » 6. apr 2016, 01:03

ROGERS 65V-1 Integrated Amplifier ($4000)

Rogers-65V-1.jpg
Rogers-65V-1.jpg (1014 KiB) Vist 3980 gange

Powered by either (2) EL-34 OR (2) KT-88 analog vacuum tubes (customer choice), the 65V-1 integrated amplifier delivers ground-breaking performance and a remarkable listening experience. Consistent with Rogers High Fidelity’s gold-standard requirements, this Class A integrated Amplifier boasts superior precision, aerospace engineering and hand-made craftsmanship that presents a new level of realism in audio reproduction.

The 65V-1 Class A integrated amplifier has been developed using precision engineering and superior craftsmanship creating an amplifier that provides flawless performance and style using a dual power tube array design.

The user experience is enhanced further with an iPad control app. A Bluetooth interface displays your amplifiers output levels, using real time telemetry information, which is smartly displayed the on app. In addition, all features can also be controlled manually on the front panel.

The 65V-1 is designed to allow use of a pair of EL-34 or KT-88 Power tubes, in addition to selectable triode and ultra liner operational modes of operation. The 65V-1 uses innovative dual drive class A design to provide the lowest possible noise and distortion. The absolute finest tube sound quality with three-dimensionality, subtleties and superior sonic dimensions that is smooth and stunning.

The 65V-1 uses a toroidal type power supply and a separate low noise DC tube filament power supply which enhances the pure fidelity signal reproduction. The core chassis is made with heavy gauge aircraft grade aluminum , in addition to a large easy-to-read LCD display for unit status.
The 65V-1 has a dedicated headphone output circuit for optimum performance when using headphones.

All Rogers High Fidelity Products are built by hand one at a time using all military grade components and Teflon coated point to point wiring!


Features
• Made In The USA – Hand built to the most exacting specifications in our New York Facility. All amplifiers are fully evaluated and acceptance tested using the the best audio test equipment made by Audio Precision. We perform all of the tests in a typical Stereophile test evaluation and many more to characterize each amplifier. Each amplifier is shipped with a fully evaluated test data package so that the customer can see how his particular unit performed after acceptance.
• Transferable Lifetime Limited Warranty- Our Products are guaranteed FOR LIFE.
• (2) EL-34 OR KT-88 Tubes – Customer can select vacuum tube based on personal preference at purchase time
• Completely Hand Wired – The entire amplifier is wired by hand using all American labor in NY. The wiring is all discrete components and all point to point. This provides a lifetime of serviceability and reliability. All of the wiring and soldering meets the Military Standard 2000 requirements. All operators are trained to this standard.
• Class A Operation – Military specification components, point to point Teflon wiring all carefully manufactured to the highest specifications.
• Control Capability via Bluetooth – Connection to an Apple smartphone application, the 65V-1 displays on application control functions of all the amplifiers features: Ultra-linear and triode modes, Volume: Ultra-linear and triode modes, Volume, Input and the operational mode setting using a LCD screen with visual indicators.
• Power Supply Circuit – Can easily handle large dynamic transitions in the audio signal being delivered while maintaining a smooth and clear midrange; vocals are presented with a truly rich and warm feel.
• Auto Bias Circuit – For long tube life and ease of operation. Self Bias circuit for adjustment free operation and longest tube life. Customer does not need to adjust tube bias. As the tubes age, they adjust for bias changes automatically. The customer can change tubes at any time or replace a single tube rather than the full set and the amp will automatically re-bias for the change.
• Manufacturing Process – All amplifiers are built using our own Statistical Process Control manufacturing processes that yield better than a 99.8% first pass yield. This is better than the airline industry’s or hospitals’ safety record. The finished amplifier is 100% reliable, tested and guaranteed for a lifetime.
• Shipping– Each amplifier is shipped using a heavy weight container system that has diecut, high density and low density foam vibration absorption material. This shipping system is designed to withstand a drop on all 6 box sides from 3 feet and produce no amplifier damage. We have NEVER had an amplifier returned for shipping damage.
• Aviation Grade Chassis – All amplifier chassis are aviation grade aluminum with a mutiphase powdercoat and clear coat finish. The amplifier finish is absolutely beautiful and bulletproof! The front panels are machined from solid blocks of aviation grade aluminum. The entire amplifier is assembled using Military Standard stainless steel hardware for ultimate reliability and a lifetime of trouble free service. All hardware is meticulously staked using an aerospace coating to eliminate any hardware failures over time through vibration, shipping or movement. This is an assembly process honed over many years of satellite manufacturing and assembly where re-tightening hardware can’t happen.
• Aerospace Specifications – All of our resistors, capacitors, transformers and inductive components meet or exceed the applicable military quality standards for parts selection. We use the same parts used by NASA in the Shuttle and Space Station equipment.
• Burn-In Process – Each amplifier undergoes a rigorous 100 hour burn-in prior to acceptance testing. This drives out any component infant mortality problems and ages each amplifier into it’s perfect listening range.
• Power Measurement System – Each amplifier has a tuned, power measurement system that allows for flawless system integration and adjustment.
• Binding Posts – We use solid milled copper binding posts plated with gold to create a seamless connection
• Internal Wiring – The entire amplifier is wired using 18 gauge Military Standard 16878 teflon coated, silverplated copper wire. This is the same wire used for the Navy’s Aegis Cruisers! Heat is the enemy of amplifier reliability. Because this is a Class A design, there is some heating of the unit which causes the wiring to age and degrade over time. Our wire never ages. The teflon coating will last a lifetime. The interior of your amplifier will look the same in 10 years as it looks coming off of the production line. The amplifier is designed using all 18 gauge wire to provide many times more the current density than can be achieved using printed wire boards or lower quality wiring.

Specifications
• Tube Complement: 2x – EL-34 or 2x KT-88 + 2x – EF86
• Frequency Response: +/- 0.1dB from 20 Hz to 20 kHz. THD less than 0.5% at 1 Watt, less than 3% at 10 Watt output, 25 Watts peak
• Input: 4x Unbalanced – One Front
• Output: 2 ohm to 32 ohm R/L + 1x Headphone output
• Weight: 24 lbs.
• Dimensions: 17” width, 12” depth, 7.5” height

http://rogershighfidelity.com/portfolio ... ers-65v-1/



ROGERS EHF-200 (MK2) Integrated Amplifier (EHF-200 $12900, MK2 $15900)

Rogers EHF-200.jpg
Rogers EHF-200.jpg (636.45 KiB) Vist 3979 gange

Until another integrated comes along that can do all of these things while staying musically true, the Rogers High Fidelity EHF-200 Mk2 will remain the integrated amp to which I compare all others—it is a standard-setting achievement. – Spencer Holbert, The Absolute Sound

Never before has music sounded so good coming out of your speakers. Clarity rules with the EHF-100 and EHF-200. Trust us. Turn them on and youʼll be blown away by their concert hall quality. There may be other tube amps on the market, but nothing compares to the power and precision of these amps. The sound is stunning and so is the look. All you have to do is close your eyes and immerse yourself in the music.


Features
• Made In The USA – Hand built to the most exacting specifications in our New York Facility. All amplifiers are fully evaluated and acceptance tested using the the best audio test equipment made by Audio Precision. We perform all of the tests in a typical Stereophile test evaluation and many more to characterize each amplifier. Each amplifier is shipped with a fully evaluated test data package so that the customer can see how his particular unit performed after acceptance.
• Transferable Lifetime Limited Warranty - Our Products are guaranteed FOR LIFE.
• Completely Hand Wired – The entire amplifier is wired by hand using all American labor in NY. The wiring is all discrete components and all point to point. This provides a lifetime of serviceability and reliability. All of the wiring and soldering meets the Military Standard 2000 requirements. All operators are trained to this standard.
• Aerospace Specifications - All of our resistors, capacitors, transformers and inductive components meet or exceed the applicable military quality standards for parts selection. We use the same parts used by NASA in the Shuttle and Space Station equipment.
• Power Supply – The power supply is a toroidal transformer based design. The transformer weighs 30 lbs alone and because of the toroid design, has zero mechanical noise. The overall power supply is 1800 watts for 200 watts of peak output power. This yields better than a 4 to 1 power ratio for ultimate headroom and transient response.
• Aviation Grade Chassis - All amplifier chassis are aviation grade aluminum with a mutiphase powdercoat and clear coat finish. The amplifier finish is absolutely beautiful and bulletproof! The front panels are machined from solid blocks of aviation grade aluminum. The entire amplifier is assembled using Military Standard stainless steel hardware for ultimate reliability and a lifetime of trouble free service. All hardware is meticulously staked using an aerospace coating to eliminate any hardware failures over time through vibration, shipping or movement. This is an assembly process honed over many years of satellite manufacturing and assembly where re-tightening hardware can’t happen.
• Internal Wiring – The entire amplifier is wired using 18 gauge Military Standard 16878 teflon coated, silverplated copper wire. This is the same wire used for the Navy’s Aegis Cruisers! Heat is the enemy of amplifier reliability. Because this is a Class A design, there is some heating of the unit which causes the wiring to age and degrade over time. Our wire never ages. The teflon coating will last a lifetime. The interior of your amplifier will look the same in 10 years as it looks coming off of the production line. The amplifier is designed using all 18 gauge wire to provide many times more the current density than can be achieved using printed wire boards or lower quality wiring.
• Auto Bias– Self Bias circuit for adjustment free operation and longest tube life. Customer does not need to adjust tube bias. As the tubes age, they adjust for bias changes automatically. The customer can change tubes at any time or replace a single tube rather than the full set of 4 and the amp will automatically re-bias for the change.
• Class A Design – All amplifiers are a full Class A design yielding the ultimate accuracy in music reproduction.
• Pentode Input Stage Utilizing An EF86 – This is an ultra low noise, high gain tube designed for high fidelity applications and has an internal shielding network. All of the overall gain is in this single stage. This significantly reduces phase distortion and yields a dynamic, stable soundstage with terrific dimensionality.
• Burn-In Process – Each amplifier undergoes a rigorous 100 burn-in prior to acceptance testing. This drives out any component infant mortality problems and ages each amplifier into it’s perfect listening range.
• Supplied Power Cable – The EHF200 and EHF200MK2 amplifiers are equipped with our proprietary Quiet Cable utilizing Furutech power connectors and our Military Standard 16878 Teflon, Silver plated wire.
• Manufacturing Process – All amplifiers are built using our own Statistical Process Control manufacturing processes that yield better than a 99.8% first pass yield. This is better than the airline industry’s or hospitals’ safety record. The finished amplifier is 100% reliable, tested and guaranteed for a lifetime.
• Binding Posts – We use Furutech binding posts for all amplifier designs. These are solid copper posts milled from OFC copper billets and then Rhodium plated with carbon fiber insulators. They are simply the best the industry has to offer. All inputs are gold plated RCA connectors.
• Operating Modes – The EHF200 and EHF200MK2 amplifiers come equipped with a triode ultralinear modeswitch for on the fly switching. This feature allows the listener to set the operating mode to affect sound stage and linearity of playback.
• Flexibility – The EHF200MK2 comes with a preamplifier input allowing the use of a favorite line preamplifier stage. It also has a tuned subwoofer output especially tuned so that music out of the subwoofer frequency range is not reflected back into the amplifier effecting the main channel performance.
• Power Measurement System – Each amplifier has a tuned, power measurement system that allows for flawless system integration and adjustment.
Remote Control– The EHF200 MK2 utilizes a 100% analog remote volume control. This feature eliminates any solid state components in the signal path which can compromise the analog, tube sound. Thisfeature is available as an addition to the EHF100 and EHF200 amplifiers.
• Shipping – Each amplifier is shipped using a 2 box, double wall container system that has diecut, highdensity and low density foam vibration absorption material. This shipping system is designed to withstand a drop on all 6 box sides from 3 feet and produce no amplifier damage. We have NEVER had an amplifier returned for shipping damage.
• Tube Interchangeability – The EHF200 series can use the KT120 or KT150 interchangeably. The power supply and grid bias network is robust enough to support either. We typically ship with the KT150.

Specifications - EHF-200
• Tube Complement: 2-EF86, 2-12AX7, 4-KT-150
• Frequency Response- Ultra-Linear Mode: 112 Watts rms Per Channel ± 0.1dB from 20Hz to 20kHz with Less Than 0.1% Total Harmonic Distortion
• Frequency Response- Triode Mode: 80 Watts rms Per Channel ± 0.1dB from 20Hz to 20kHz with • Less Than 0.1% Total Harmonic Distortion
• Gain: 40dB
• Input: 4 Unbalanced, 100k Ohm
• Output: 2 ohm to 32 ohm
• Weight: 60 Lbs.
• Dimensions: 17″ width, 14″ depth, 11.5″ height
• Ultralinear / Triode mode selectable
• Stepped Gain Attenuator
• Power Cable: Rogers High Fidelity Quiet Cable Included

Specifications - EHF-200 MK2
The new EHF-200 MK2 has the same specs as the EHF-200 with the following additions:
• A preamplifier input
• A preamplifier output for a powered sub-woofer
• A remote volume control
The pre-in and pre-out functionality allow the EHF-200 MK2 to be used in a component system like a stand alone power amplifier without the added costs of separate units, cabling, maintenance of 2 power amplifiers.

http://rogershighfidelity.com/portfolio ... f-200-mk2/
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Re: Rør, hvis du tør

Indlægaf Solderdude » 21. dec 2016, 07:53

https://www.wolfearaudio.ca/collections/all

here is another one for your excellent compendium.
Use your ears to enjoy music, not as an analyzer.
Solderdude

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Re: Rør, hvis du tør

Indlægaf Mortenhoe » 28. dec 2016, 18:58

Stødte på den her på Ebay.

Little Bear B4 portable tube amp

En lille hybrid rørforstærker, med et 1000mAh batteri, som kan ligge i lommen.

Den er lidt sjov.

Billede
Elektrikeren.
Stationary: iFi nano iUSB3.0 + Aune S6 Pro. Fostex TH-600 med balanceret Silver Dragon kabel.
Portable: Radsone ES100. Balanceret EMXs-500. Balanceret Audio Technica M50x. APTx Vido.
Collection: Bravo Audio Ocean, Zishan Z3, HiFiMan HE-400, Hyland Saturn, Cleer DU, AKG K240 Sextett, Yamaha YH-3(Custom), Superlux HD-681, VE Monk + lidt mere.
Mortenhoe

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Re: Rør, hvis du tør - Tor Audio

Indlægaf kvik » 20. mar 2017, 23:44

TOR AUDIO Nick HEADAMP ($490)

Tor Audo Nick.jpg
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The first self-made tube amplifier with toroidal audio transformers.

The circuit has been created by us independently, we did not use any ready-made technical solutions, but found our own. We have spent more than two years experimenting with the circuit and transformers, but the results justify the time and effort spent.

To get a natural, lifelike sound we had to abandon conventional audio transformers. Instead we decided to use such exotic things as toroidal audio transformers. This is the most complicated part, toroidal transformers take approximately 80% of the time required for the manufacturing of the device, but they sound great.

Gain Stage is assembled on a dual triode 6N8S (equivalent to 6SN7). We only use triodes, because they have the lowest internal resistance, which has a positive effect on the quality of sound.

No detail is left without our attention, every tube, resistor and capacitor is selected and checked. Each item has a double margin of power and voltage, whereby the circuit has a high reliability and durability.

Each unit is assembled by hand; the production of body parts, transformer winding, assembly and adjustment of the circuit.


Features
● Class A
● Toroidal power transformer
● Point-to-point wiring
● Housing materials - bamboo, wood and steel
● Handmade

Specifications
● Tube: 6N8S (equivalent to 6SN7) (not hybrid)
● Frequency response: 10 hz - 115 Khz
● Input: 1/4" (6.3m) Jack
● Output: 1/4" (6.3mm) Jack
● Recommended load impedance: 25 - 600 ohm
● Output power: 450mW/ch
● Mains power: 100-127V / 220-240V (toroidal power transformer)
● Warranty: 3 years
● Money Back Guarantee: 14 days

https://www.etsy.com/no-en/listing/5159 ... e_active_4



TOR AUDIO Roger HEADAMP ($550)

Tor Audio Roger.jpg
Tor Audio Roger.jpg (525.07 KiB) Vist 3129 gange

The first self-made tube amplifier with toroidal audio transformers.

The circuit has been created by us independently, we did not use any ready-made technical solutions, but found our own. We have spent more than two years experimenting with the circuit and transformers, but the results justify the time and effort spent.

To get a natural, lifelike sound we had to abandon conventional audio transformers. Instead we decided to use such exotic things as toroidal audio transformers. This is the most complicated part, toroidal transformers take approximately 80% of the time required for the manufacturing of the device, but they sound great.

Gain Stage is assembled on a dual triode 6N8S (equivalent to 6SN7). We only use triodes, because they have the lowest internal resistance, which has a positive effect on the quality of sound.

No detail is left without our attention, every tube, resistor and capacitor is selected and checked. Each item has a double margin of power and voltage, whereby the circuit has a high reliability and durability.

Each unit is assembled by hand; the production of body parts, transformer winding, assembly and adjustment of the circuit.


Features
● Class A
● Toroidal power transformer
● Point-to-point wiring
● Housing materials - bamboo, wood and steel
● Handmade

Specifications
● Tube: 6N8S (equivalent to 6SN7) (not hybrid)
● Rectifier: 6C5S (equivalent to 6X5GT)
● Frequency response: 10 hz - 125 Khz
● Input: 1/4" (6.3m) Jack
● Output: 1/4" (6.3mm) Jack
● Recommended load impedance: 25 - 600 ohm
● Output power: 450mW/ch
● Mains power: 100-127V / 220-240V (toroidal power transformer)
● Warranty: 3 years
● Money Back Guarantee: 14 days

https://www.etsy.com/no-en/listing/5297 ... e_active_2



TOR AUDIO Rick/David TUBE DAC ($490/$550)

Both amplifier models are available with a built-in DAC at the same price points. Nick is then Rick, and Roger is David. The DAC models have Pre-Out and Headphone-Out.

Additional specifications
● DAC: TI PCM5102A, USB: XMOS (32bit / 384K).
● Frequency response (Digital): 20 Hz - 20 kHz.
● Input: USB
● Outputs: RCA, 1/4" (6.3mm) Jack

https://www.etsy.com/no-en/listing/5297 ... ve_3&frs=1
https://www.etsy.com/no-en/listing/5297 ... ve_1&frs=1



http://toraudio.com/main.html?v=6#
AKG K240DF | K400 | K500 \\ VE Zen 2.0 | Myst Nail 2 | Spiral Ear 3-way Ref \\ Zigis Trīsstūris \\ Tento PortaDAC \\ Allo DigiOne
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Re: Rør, hvis du tør - Pier Audio

Indlægaf kvik » 24. mar 2017, 00:55

Pier Audio MS-300 HD (€3000)

Pier Audio MS-300 HD.jpg
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New integrated 300B single triode full tube amplifier for 2 x 8 watts, equipped with a double rectifying valve . This new amplifier is designed for high-performance speakers and headphones, with Jack and XLR connection and 3-position adjustable impedance selection for all types of headphones.

Specifications
• Power: 2 x 8W
• Frequency response: 18Hz-32kHz
• Distortion: 1% (1kHz)
• Signal / noise ratio : 88dB
• Input signal: 300MV
• Input impedance:100 kΩ
• Output Impedance: 6Ω
• Pre-amp Impedance:100K
• Selectable headphone impedance: 16-64Ω, 64-250Ω, and 300-800Ω
• Inputs: RCA x2, XLR x1
• Power consumption: 280W
• Power supply: AC 230V-115±5%, 50Hz
• Net weight: 28 kg
• Gross weight: 35 Kg (delivered in wood box on request))
• Dimensions: 300 (L)×475 (D)×240 mm (H)
• Tubes: 300B x2, 6SL7 x2, 6SN7 x2, 5Z3PA x2

https://www.pier-audio.com/amplificateu ... 00-hd.html
AKG K240DF | K400 | K500 \\ VE Zen 2.0 | Myst Nail 2 | Spiral Ear 3-way Ref \\ Zigis Trīsstūris \\ Tento PortaDAC \\ Allo DigiOne
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Re: Rør, hvis du tør - Audio-Classic

Indlægaf kvik » 26. mar 2017, 23:42

Audio-Classic Head Amp E88 (DKK 5200)

Audio-Classic Head Amp E88.jpg
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Head Amp E88 with Interstage transformers

Most amplifiers use capacitors in the signal path. In Head Amp E88 we use interstage transformers to achieve the best sound obtainable, as the use of capacitors affects (colors) the sound.

The amplifier is hand-built using point-to-point wiring and select components. The power supply is pcb, though.

The tubes are E88CC (6922). They are regulated exactly to 6.3 V DC, which is of great importance to the sound. E88CC is a nice musical tube at a reasonable price. Being widely available it also offers ample opportunity for Tube Rolling.

Sonically this amplifier is a delightful experience. Everything is in its right place and sounds fantastic, regardless of which music is played. Bass guitar, church organ, voices, the amplifier does it all. The amplifier is never being pushed. You'll quickly discover if your CD or LP is properly recorded, though.

The amplifier can be used on its own, connected directly to the source (DAC, CD-player, ao), or it can be connected to a preamplifier output (through tape out or signal out).

The amplifier casing is made of a black steel plate with wooden side panels in mahogany. The steel plate is filled, and painted twice. Optionally the casing is available in stainless steel with mahogany side panels. A new design using a 1.5mm black lacquered steel plate is available as well.

Tube sockets and RCA connectors are gold-plated to prevent corrosion but also to achieve the optimal connection.

New amplifiers and tubes need apprx 50 hours of burn-in. The amplifeir will sound at its best after apprx a half hour of operation.



• Interstage transformers
• Select and premeasured components
• Blue ALPS potentiometer, optionally motorized
• 6,35 mm headphone jack
• Impedance range: 20 – 500 ohms
• SNR: 90 db
• Dimensions: 18 x 20 x 14 cm
• Chassis: Black or stainless steel plate with mahogany side panels
• CE approved
• Designed and manufactured in Denmark
• Lead time is 1-2 weeks


http://www.audio-classic.dk/index.php/f ... rkere.html
AKG K240DF | K400 | K500 \\ VE Zen 2.0 | Myst Nail 2 | Spiral Ear 3-way Ref \\ Zigis Trīsstūris \\ Tento PortaDAC \\ Allo DigiOne
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Re: Rør, hvis du tør

Indlægaf Gerner » 26. mar 2017, 23:48

Det er et meget flot stykke arbejde Kvik!
9musik
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Re: Rør, hvis du tør

Indlægaf kvik » 30. mar 2017, 23:18

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AKG K240DF | K400 | K500 \\ VE Zen 2.0 | Myst Nail 2 | Spiral Ear 3-way Ref \\ Zigis Trīsstūris \\ Tento PortaDAC \\ Allo DigiOne
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