WA7 Fireflies (3rd gen) Balanced Headphone Amplifier/Preamplifier/DAC ($1400)
- Woo WA7 gen3.jpg (1.46 MiB) Vist 14379 gange
Nearly a decade ago, we set out to create an attractive, high-performance vacuum tube amplifier that will delight the eyes and ears of music lovers. The original WA7 fireflies headphone amplifier/DAC was born. We are proud to introduce to you the improved 3rd generation of our award-winning WA7 fireflies.
Keeping the same elegant look that makes WA7 fireflies unique, the new 3rd gen now features a built-in linear power supply making the setup a breeze and a one-box solution. In addition, the 3rd gen employs a balanced headphone output driven by a pair of 12AU7 vacuum tubes. The power output is over 1.5w of power per channel @4 Ohms; ideal for a wide range of IEM (in-ear monitors) and power demanding full-sized headphones. The user-replaceable vacuum tubes can be upgraded at any time to customize the sound to the listener's preference. The class-leading performance ESS SABRE DAC allows the user to enjoy music from streaming services such as TIDAL, Qobuz, Apple Music, and Amazon Music HD in lossless resolution.
You asked for it and we listened. The new 3rd gen is also a tube preamplifier enabling the user to integrate WA7 fireflies with their home speakers system or drive a pair of desktop-powered speakers for more ways to enjoy the uncompromised sound. See the quick start guide for all the possibilities of this amazing little cube.Highlights
• Updated to 3rd generation in Sept 2021
• Compatible with Apple iPhone/iPad, Android devices, Mac and Windows computers, how-to video LEARN MORE
• Class-A balanced headphone amplifier and DAC
• Up to 1.5w power output (4.4mm balanced)
• Ultra-low noise for sensitive IEMs
• Tubes: 12AU7 / 5963 driver tubes, self-biasing
• Premium Polytetrafluoroethylene (PTFE) tube sockets
• ESS SABRE Audiophile DAC up to 24-bit/384kHz PCM, and 128DSD/5.6MHz
• XMOS xCORE-AUDIO asynchronous USB compatible with PC, Mac, Android and iOS devices (with Apple CCK or Android OTG adapter)
• High-retention USB connector x 1
• RCA analog Input x 1
• 4.4mm (5-pole) by Pentaconn by NIPPON DICS balanced headphone output (recommended)
• 6.3mm (1/4”) stereo headphone output
• Headphone impedance compatible range 8–600 Ohms
• Frequency response: 10Hz to 46kHz, -3dB
• Signal to noise ratio: 100 dB
• Tube preamplifier function (PRE-OUT):
- 4.4mm (5-pole) by Pentaconn by NIPPON DICS balanced pre-out output (recommended)
- 6.3mm (1/4”) stereo pre-out
• Anodized aluminum chassis, available in midnight black or silver [coming soon]
• External dimensions with glass: 5.25" (H) x 4.8" (W) x 6" (D)
• Weight: 8.5 lbs.(3.9kg)
• Internal linear power supply
• Global voltage (100v–240v) without converter
• Designed and assembled in New York, USA
• Three-year limited warranty
https://wooaudio.com/amplifiers/wa7-3rd-generationWA8 Eclipse Headphone Amplifier/DAC ($1900)
- WA8 Eclipse.jpg (172.76 KiB) Vist 39749 gange
Woo Audio’s epic WA8 Eclipse is the world's first battery-operated vacuum tube headphone amplifier. Featuring SET Class-A transformer output for transparent sound quality, a built-in 24bit/384kHz DAC, and easy transportability / set-up, high fidelity audio listening is possible anywhere.. With its high power output, the Eclipse is capable of driving high-end headphones of 8–600 ohm impedance, while its ultra-low noise circuitry is ideal for in-ear monitors.
While portable, the Eclipse boasts a robust military-grade vacuum tube design rated for 5,000 hours of life. Versatile in analog and digital realms, it offers two- or three-tube operation to tailor the sound quality to a variety of headphones and in-ear monitors. The Class-A, Single-ended Triode topology uses ultra-efficient OCC single crystal copper output transformers offering high bandwidth and low loss. The Eclipse also uses an audiophile-grade ESS SABRE Reference 24bit/384kHz DAC, excelling with hi-res music files and compatible with Apple iOS and Android devices.
The Eclipse operates via external DC power or "off-the-grid" battery operation. Advanced technology provides steady and pristine power to the vacuum tubes and the DAC, offering several hours of play – and the unit is operable during charging. For the first time, high-fidelity and uncompromised sound can be achieved without boundaries.Highlights
• Compatible with Apple iPhone/iPad, Android devices, Mac and Windows computers
• Gorilla glass cover to showcase tubes: Subminiature 6S31B power x2, 6021 driver x1
• User selectable two or three tubes operation
• Single-ended, all-tube design (not hybrid), Class A
• Custom Ni Alloy core output transformers
• ESS SABRE Reference DAC
• Hi-Res music playback 24 bit, 384kHz PCM, and up to DSD128
• XMOS xCORE-AUDIO asynchronous clocking USB Type-B Input x 1, 1/8" (3.5mm) analog Input x 1
• 1/4” (6.3mm) and 1/8" (3.5mm) headphone outputs (8–600 Ohms)
• Rechargeable Lithium-ion battery
• Up to 4 hrs. of continuous music playback
• Anodized aluminum chassis available in black, space gray and gold
• Power rating (3-tube): 250mW@32Ω, 350mW@50Ω, 180mW@120Ω, 120mW@300, 80mW@600Ω
• Dimensions: 6.69" (L) x 3.6" (W) x 1.69" (D) 2.4lbs.
• Global voltage (100v–240v) without a converter
http://wooaudio.com/products/wa8eclipse.htmlWA6 (2nd gen) Headphone Amplifier ($1000, fully upgraded +$810)
- WA6 Headphone Amplifier.jpg (244.94 KiB) Vist 39714 gange
Handcrafted since 2008, WA6 (2nd gen) has set the standard for headphone amplifiers in its class. It can drive full-size headphones and in-ear monitors ranging from 8–600 Ohms with ease. WA6 (2nd gen) is an all-tube design, Class-A, transformer-coupled, single-ended triode (SET) amplifier. Under the hood of the all aluminum chassis is the same clean point-to-point wiring and premium quality parts found in our top tier models. WA6 (2nd gen) is an exceptional headphone amplifier for every music lover.Highlights
• Updated to 2nd generation in April 2017
• 2nd gen is a minor update to driver/power tubes from 6v to 13v
• Tubes: 13DE7 driver/power x 2, 5U4G rectifier x 1
• Polytetrafluoroethylene (PTFE) tube sockets
• Singled-ended Triode, Class-A
• Transformer-coupled, Point-to-Point wiring
• Pseudo-dual power supply
• RCA input x 1
• HI / LO headphone impedance switch
• 1/4" (6.3mm) stereo headphone output (8–600 Ohms)
• ALPS potentiometer and power switch
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Global voltage (100v–220v) without converter
• Dimensions: 6"(H), 5½"(W), 13"(D), 13 lbs.
http://www.wooaudio.com/products/wa6.htmlWA6-SE (2nd gen) Headphone Amplifier ($1500, fully upgraded +$920)
- WA6 SE Headphone Amplifier.jpg (204.97 KiB) Vist 39713 gange
WA6-SE (2nd gen) is the dual chassis big brother of WA6 (2nd gen). It is also an all-tube design with point-to-point wiring, Class-A, transformer-coupled, single-ended triode (SET) headphone amplifier. WA6-SE (2nd gen) features an independent power supply unit which greatly improves its sonic performance. It can drive most dynamic driver and planar magnetic headphones ranging from 8–600 Ohms to their full potential; delivering a rich tube sound with speed and dynamics typically not found in an amplifier of this size. Whether you have one headphone or ten, WA6-SE (2nd gen) would maximize the listening enjoyment.HIghlights
• Updated to 2nd generation in April 2017
• 2nd gen is a minor update to driver/power tubes from 6DE7 to 13DE7 (1st and 2nd gen tubes incompatible)
• Tubes: 13DE7 driver/power x 2, 5U4G rectifier x 1
• Polytetrafluoroethylene (PTFE) tube sockets
• Single-ended Triode, Class-A
• Transformer-coupled, Point-to-Point wiring
• Pseudo-dual power supply
• RCA input x 2
• Dual 1/4" (6.3mm) stereo headphone outputs (HI / LO impedance)
• ALPS potentiometer and power switch
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Global voltage (100v–240v) without a converter
• Dimensions: 6"(H), 5½"(W), 13"(D) amplifier 12 lbs., 6"(H), 5½"(W), 13"(D) power supply 10 lbs.
http://www.wooaudio.com/products/wa6se.htmlWA2 Headphone Amplifier ($1500, fully upgraded +$380)
- WA2 Headphone Amplifier.jpg (91.36 KiB) Vist 39718 gange
Handcrafted since 2004, the critically acclaimed WA2 is a high performance OTL (Output Transformerless) headphone amplifier. WA2 is a Class-A, all-tube design, single-ended triode (SET) with point-to-point wiring to achieve the most analog sound. Music lovers with high impedance headphones (above 100 Ohms) would find WA2 to be the ideal pairing for their high-end headphones.Highlights
• Tubes: 6080 power x 2, 6922 driver x 2, 6CA4 rectifier x 2
• Polytetrafluoroethylene (PTFE) tube sockets
• Single-ended Triode, Class-A
• OTL (output transformerless), Point-to-Point wiring
• Individual filter choke and rectifier per channel
• Pseudo-dual power supply
• RCA input x 4
• 1/4" (6.3mm) stereo headphone output
• ALPS potentiometer and power switch
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Global voltage (100v–220v) without converter
• Dimensions: 5½"(H), 13"(W), 9"(D), 17 lbs.
http://www.wooaudio.com/products/wa2.htmlWA22 (2nd gen) Fully Balanced Headphone Amplifier/Preamplifier ($2700, fully upgraded +$2050)
- WA22 (2nd gen) Headphone Amplifer and Preamplifier.jpg (223.89 KiB) Vist 39718 gange
Originally introduced in 2009, WA22 has been an audiophile favorite. New for 2018 is improved sonic performance and preamplifier feature for use with a Hi-Fi system. WA22 (2nd gen) is an all-tube design, fully balanced headphone amplifier and preamplifier. The advantage of a fully balanced system is improved channel separation, more precise soundstage, and imaging. Perfectly suited for the headphone enthusiast and experienced audiophiles seeking flexibility and purest sound.HIghlights
• Updated to 2nd generation in March 2018
• Tubes: 6SN7 driver x 2, 6080 power x 2, 5U4G rectifier x 1
• Polytetrafluoroethylene (PTFE) tube sockets
• ALPS RK27 4-channel balanced smooth potentiometer
• Fully-balanced design, Class-A
• Power output: up to 1.5 watts per channel @32 Ohms
• Transformer-coupled, Point-to-Point wiring, Pseudo-dual power supply
• Phase Splitter for use with unbalanced components
• HI / LO impedance setting
• XLR input x 1, RCA input x 1
• Dual 3-pin XLR (left and right channel), 4-pin XLR and 1/4" (6.3mm) stereo headphone outputs
• XLR balanced PREAMP output (<50 ohms)
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Dimensions: 7"(H), 12"(W), 10½"(D) amplifier 25 lbs.
http://www.wooaudio.com/products/wa22.htmlWA5-LE (2nd gen) Headphone Amplifier ($4500, fully upgraded +$5490)
- WA5-LE Headphone Amplifier.jpg (222.11 KiB) Vist 39701 gange
WA5-LE (Lite Edition) is a single-ended triode (SET), class A tube amplifier. It differs from the highly acclaimed WA5 only in that it is a dedicated headphone amplifier and cannot be used to drive loudspeakers. In all other respects, WA5-LE is identical to the WA5 and offers the same captivating sound quality. WA5-LE is designed around the audiophiles' favorite 300B vacuum tube. This tube provides exceptional transparency allowing the listener to experience music close to a live performance. Highlights
• Updated to 2nd generation in August 2015
• Tubes: 6SN7 driver x 2, 300B power x 2, 5U4G rectifier x 2
• Polytetrafluoroethylene (PTFE) tube sockets
• Single-ended Triode, Class-A
• Transformer-coupled, Point-to-Point wiring
• Pseudo-dual power supply, dual chassis design
• User selectable HI/LO headphone POWER
• User selectable HI/LO headphone IMPEDANCE
• User selectable HI/LO headphone LEVEL
• XLR input x 1, RCA input x 2
• 4-pin XLR and 1/4" (6.3mm) stereo headphone outputs
• ALPS smooth potentiometer
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Global voltage (100v–240v) without a converter
• Dimensions (with tube & clearance for ventilation): Amplifier: 12"(H), 9"(W), 17"(D) 35 lbs., Power supply unit: 12"(H), 9"(W), 17"(D) 35 lbs.
Optional: Available only at the time of original build the 'Audiophile-grade premium internal parts upgrade' adds Mundorf MCap Supreme Silver/Gold input coupling caps and Mundorf MLytic HV double-capacity electrolytic capacitors
http://www.wooaudio.com/products/wa5le.htmlWA5 (2nd gen) Headphone/Integrated Amplifier ($6500, fully upgraded +$5600)
- WA5 Headphone and Integrated Amplifier.jpg (638.92 KiB) Vist 39685 gange
WA5 has been setting the standard for 300B-based all-tube stereo amplifiers among music lovers since 2008. The WA5 features separate speaker and headphone amplifiers in two discrete amplification sections to achieve the highest performance in both forms of usage. The power supply is divided into different units to ensure that the audio signal is pristine and isolated, and advanced output switching enables the user to select speaker or headphone output effortlessly. It is the most versatile amplifier for high-efficiency speakers and any dynamic/planar headphones.
Unique to WA5 is the user-customizable headphone output (HI/LO power, HI/LO impedance, and HI/LO level) located on the front panel. When used in conjunction, the user can optimize the synergy between amplifier and headphones to achieve the ideal pairing and performance. At maximum, headphone outputs get full eight watts per channel – easy to satisfy the needs of any demanding headphones.
To tailor different user requirements, we also offer a headphone-only model – WA5-LE – which boosts the same headphone circuitry and functions as the WA5.Highlights
• Updated to 2nd generation in August 2015
• Tubes: 6SN7 driver x 2, 300B power x 2, 5U4G rectifier x 2
• Polytetrafluoroethylene (PTFE) tube sockets
• Single-ended Triode, Class-A
• Transformer-coupled, Point-to-Point wiring
• Pseudo-dual power supply, dual chassis design
Audiophile-grade premium internal parts upgrade adds the following: Mundorf MCap Supreme Silver/Gold input coupling caps (matched pair) 0.15uf/600V, Mundorf MLytic HV double-capacity electrolytic capacitors 100u x 3, Mundorf MLytic HV double-capacity electrolytic capacitors 220u x 4
• WBT Nextgen speaker binding posts and RCA
• User selectable HI/LO headphone POWER
• User selectable HI/LO headphone IMPEDANCE
• User selectable HI/LO headphone LEVEL
• XLR input x 1, RCA input x 2
• 4-pin XLR and 1/4" (6.3mm) stereo headphone outputs
• Speaker binding posts x 2 pairs (left and right channels)
• ALPS smooth potentiometer
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Global voltage (100v–240v) without a converter
• Dimensions (with tube & clearance for ventilation): Amplifier: 12"(H), 9"(W), 17"(D) 35 lbs., Power supply unit: 12"(H), 9"(W), 17"(D) 35 lbs.
http://www.wooaudio.com/products/wa5.htmlWES (2nd gen) Electrostatic Headphone Amplifier ($5000, fully upgraded +$2840)
- WES (2nd gen) Electrostatic Headphone Amplifier.jpg (289.88 KiB) Vist 39700 gange
WES (2nd gen) is the ultimate electrostatic headphone amplifier for use with STAX headphones. The new 2nd gen uses a matching quad of output loading chokes utilizing Single Crystal Copper wires (the purest form of copper) with our proprietary winding scheme. The results are a significant improvement in clarity, sound space, dynamic range, and control. WES is a two-chassis system comprising a power supply and a fully balanced amplifier and innovative dual power switch that treats the tubes more gently when starting the unit from cold. Turning on just one of the power switches provides low voltage to the heaters while the WES remains in standby mode. Turning on both power switches allows the unit to operate at full power. WES will reward the listener with reference quality sound without fatigue.Highlights
• Updated to 2nd generation in April 2017
• Tubes: EL34 power x 4, 6SL7 driver x 4, 5AR4 rectifier x 2, 12AU7 phase inverter x 2
• Polytetrafluoroethylene (PTFE) tube sockets
• ALPS RK27 4-channel balanced smooth potentiometer
• Two 12AU7 phase splitter (unbalanced input to balanced input conversion)
• Fully-balanced design, Class-A
• Transformer-coupled, Point-to-Point wiring
• Pseudo-dual power supply
• STAX Pro Bias 5-pin EarSpeakers output x 2
• Compatible with all STAX, HiFiMan Shangri-la Jr., Dan Clark Audio VOCE electrostatic headphones
• XLR input x 2, RCA input x 1
• Auricap capacitors for interstage and output coupling
• Mills and Kiwame resistors
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Global voltage (100v–220v) without converter
• Dimensions: Amplifier: 7½"(H), 16½"(W), 12"(D) 20 lbs., Power supply unit: 4½"(H), 16½"(W), 12"(D) 20 lbs., DC cord length: 18” (end to end)
Optional: Available exclusively at the time of build the Audiophile-grade premium internal parts upgrade addsV-Cap Teflon Film Tin Foil reference grade audio capacitors and V-Cap Oil Impregnated Metallized Polypropylene reference grade audio capacitors
http://www.wooaudio.com/products/wes.html3ES Electrostatic Headphone Amplifier/Preamplifier (STD $9000/Elite $14000/Tube upgrade +$7500)
- 3ES Electrostatic Headphone and Preamplifier.jpg (108.77 KiB) Vist 39685 gange
With over 10 years of experience in electrostatic amplifier designs. The all-new 3ES is our flagship electrostatic headphone amplifier and preamplifier. It shares the same architecture as our flagship WA33 dynamic headphone amplifier in a two-unit design where the top unit is an amplifier docking on the power supply using our internal coupling architecture (ICA) technology. The 3ES employs two 6SN7 driver tubes pushing four 300B power tubes as the output stage and one rectifier tube in the center of the amp. The new 3ES achieves the most ambitious dream in the audio world.Highlights
• Compatible with 5-pin 580v (Pro-bias) for STAX, HiFiMan, MrSpeakers headphones
• Dual headphone output [simultaneous operation]
• Compatible with all STAX, HiFiMan Shangri-la Jr., Dan Clark Audio VOCE electrostatic headphones
• TKD (Tokyo Ko-on Denpa) 4-channel balanced smooth potentiometer
• XLR input x 2, RCA input x 1
• User selectable output: pre-amp or headphone
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Dimensions [without tubes]: 17 3/4" (W), 7 1/4" (H), 13 1/2" (D) / 450.85mm (W), 184.15mm (H), 342.90mm (D), weight: 52 lbs. / 24 kg.
• Voltage: AC 100 - 120V 60HZ or AC220 - 240V, 50HZ, voltage built to destination country
• Designed and assembled in New York, USA
Elite Edition
• Mundorf Supreme Silver/Gold audio capacitors
• Single Crystal copper hook-up and signal wires are used throughout.
• Alps RK50 4-channel volume control in brass enclosure
• Cardas Audio XLR and WBT RCA connectors
• 3ES Elite Edition 24k gold-plated plaque
https://wooaudio.com/amplifiers/3esWA33 Fully-balanced Headphone Amp/Preamplifier (STD $8500/Elite $16000/JPS upgrade +$2000/Tube upgrade +$5840)
- WA33 Fully-balanced Headphone and Preamplifier.jpg (226.26 KiB) Vist 39684 gange
In 2009, we introduced two world-class fully balanced headphone amplifiers––the WES electrostatic amp and the WA22 dynamic amp. Both are preferred choices among the most discerning audiophiles. Here at Woo Audio, we constantly push the performance boundaries. The newly developed WA33 is a state-of-the-art, fully balanced headphone amplifier that raises the bar in setting a new reference in music reproduction.
The WA33 employs a true fully balanced design in a compact form factor, featuring a quad of 6C45 tubes for the driver that pushes a quad of 2A3 tubes for the power, and all in direct-heated triodes. It delivers high power to drive demanding headphones to their full potential while maintaining a low noise floor for use with highly sensitive models. The WA33 shares the same striking appearance of the critically acclaimed WES, where both amplifier units are independent of the power supply. This approach eliminates any interference to critical audio components. Additionally, our internal coupling architecture (ICA) technology allows the WA33 amplifier to merge with the power supply unit without an external umbilical cord. The ICA shortens the signal path and thus significantly reduces unwanted electrical interference and raises sound performance to a level beyond what anyone has previously experienced in a headphone system.
The WA33 reveals the most delicate detail with the highest level of refinement. Complex music passages are handled with ease and authority. The expansive soundstage, holographic imaging, and rich tones that are pristine, natural, and vivid create a sense of realism that gives the user a euphoric listening experience. With the WA33, music comes to life.Highlights
• Same default tubes for all versions: 6C45 driver x 4, 2A3 power x 4, 5U4G rectifier x 1
• [JPS wiring] JPS Alumiloy® hook-up and signal wires are used throughout.
• Fully balanced design, Push Pull, Class-A
• Polytetrafluoroethylene (PTFE) tube sockets
• TKD (Tokyo Ko-on Denpa) 4-channel balanced smooth potentiometer
• Transformer-coupled, Point-to-Point wiring
• Internal Coupling Architecture (ICA)
• XLR input x 2, RCA input x 1
• Outputs: Dual 3-pin XLR (left and right channel), 4-pin XLR x 1 and 1/4" (6.3mm), XLR x 1 preamp
• User selectable output: pre-amp or headphone
• User selectable HI/LO impedance and HI/LO level for headphone
• Headphones impedance: 8—600 Ohms
• Frequency response: 10Hz— 60kHz, -2dB
• Power output: up to 10 watts per channel @32 Ohms
• Signal/Noise: > 95 dB, THD: < 0.05%, 1kHz
• Anodized aluminum chassis, available in black or silver
• Self-biasing with compatible tubes [chart]
• Power consumption: 150w
• Voltage: AC 100 - 120V 60HZ or AC220 - 240V, 50HZ, voltage built to destination country
• Dimensions: 17.5"(W), 12"(D), 7.5"(H) without tubes, weight: 53 lbs for Standard, 56 lbs for Elite Edition
Elite Edition
• Ultra high-bandwidth, low-loss output transformers custom-made with Single Crystal Copper wires and Ni Alloy metal
• Single Crystal copper hook-up and signal wires are used throughout.
• [JPS wiring] JPS Alumiloy® hook-up and signal wires are used throughout.
• ALPS RK50 4-channel balanced potentiometer in brass enclosure
• Mundorf MCap Supreme Silver/Gold capacitor for interstage coupling, one per channel (4pcs)
• Mundorf MTube capacitors for voltage filter (3pcs)
• Cardas Audio XLR and WBT RCA connectors
• WA33 Elite Edition 24k gold-plated plaque
http://wooaudio.com/products/wa33.htmlWA234-MONO Headphone/Intergrated Amplifier ($18000, Tube upgrade +$4700)
- WA234-MONO Headphone and Integrated Amplifier.jpg (1.12 MiB) Vist 39684 gange
The WA234-Mono is the ultimate SET (single-ended triode) amplifier. The design is unlike any that the world has ever seen. The WA 234 unique design allows for use of legendary tubes like the 300B, 2A3 and 45 triodes. The choice of tubes offers the highest level of transparency and musicality. The WA234-Mono let you experience music like never before. You can now use any headphone and many high efficiency speakers. Whereas a typical tube amplifier allows you to use only one type of power tube (or a substitute with a similar rating), the 234-MONO increases your options in an elegant way. A tube-switching key (TSK) allows the amplifier to accept 2A3, 300B, or 45 power tubes, so you can instantly switch your tube to suit your music or your mood. Also, an output switching key (OSK) allows the listener to switch between speaker and headphone output modes, making it possible to enjoy a piece of music through headphones, then immediately share it with friends through speakers. To make the 234-MONO even more versatile, Woo Audio created output-switching keys for cathode and plate outputs for high and low-impedance headphones. Highlights
• Monoblock design
• Tubes: 13EM7 driver x 1, 300B power x 1, 5U4G rectifier x 1 each amplifier
• Compatible with 2A3/300B/45 power tubes
• Single-ended Triode, Class-A
• Transformer-coupled, Point-to-Point wiring
• Independent headphone and speaker circuity
• Selectable Cathode or Plate output with KEYS
• Anodized aluminum chassis, available in Diamond Black or Platinum Silver
• Polytetrafluoroethylene (PTFE) tube sockets
• Self-biasing with compatible tubes [chart]
• Dimensions without tubes: 10" (H) x 8.75" (W) x 13.25" (D), 60 lbs. / 254mm (H) x 222.25mm (W) x 336.55mm (D), 27.21 kg.
• Voltage (100v–240v) factory configurable
• Designed and handcrafted in New York, USA
https://wooaudio.com/amplifiers/wa234mono