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While it is true that oversampling DACs are textbook correct, if you make the wrong assumptions about the human hearing system, you may end up making mistakes, even if you do the math right !
Let me give you a simple example : it is generally assumed we hear the spectrum of sounds, but can't hear the phase.
Now try "binaural beats" on Google and listen for yourself. These clearly show the phase information IS sensed, AND remains present far inside the brain.
So maybe the spectrum-only approach to DAC design is not telling the whole story...
Traditional non-oversampling DACs from the past did not make any assumptions about hearing mechanisms, they just tried to replicate in analog what you fed them digitally as closely as possible...
What are the main features of this DAC ?
And what are the main goals of its design ?
Extract the pure performance of the last built non-oversampling true 16-bit TDA1543 DAC from Philips
Optical & Coaxial inputs (leftmost switch on the photo)
DIR9001 96 kHz SPDIF Receiver (lowest-jitter on the market - 50ps)
Supports sampling frequencies from 28kHz to 108kHz (continuous range, including non-standard frequencies)
TDA1543 16-bit DAC - the original from Philips®
Passive I/V conversion
No Op-Amp - direct output with 2Vpp (will drive any power amp well)
Huuuge capacitors on the output path provides sub-Hertz cutoff frequency (<0.3Hz on a 10kOhms input)
Dual Stage power supply regulation (for a super low background noise level)
Separate voltage regulator for the DAC and the Digital SPDIF receiver (same reason as above)
Battery-powered with dual 9V NiMH batteries
Smart battery charger on-board (quickly charges the batteries when depleted, keeps them charged at low current when idle)
When both power switches are on, the batteries are recharged, and are also used to buffer the external power, completely removing hum.
Will Directly drive any power amplifier
Easy to carry around and make it listen to yours friends
4+ hours of listening on the batteries alone
Billederne er af min egen enhed