On the Bench (JEJ)
following tests used digital signals input (XLR) to the DAC-1.
kHz, THD was very low.
was also very low, using 1 kHz and 1.5 kHz sine waves.
5 kHz and 6 kHz input, IMD was still a low 0.0012%.
this higher frequency of 10 kHz, THD was still very low.
with 11 kHz and 12 kHz input, was only 0.0011%.
Using a set of multiple frequencies, IMD remained very low.
Going to 24/96 digital signals, using 1 kHz, THD was 5 times lower than
when using the same frequency but at 16/44 sampling. Notice also that the
noise floor is lower with 24/96 than with 16/44.
was also much lower using 24/96 than 16/44 for 1 kHz and 1.5 kHz sine
Again, with 24/96, the IMD was about 5 times lower than when input with
the same frequencies (5 kHz and 6 kHz) at 16/44 sampling.
kHz at 24/96 sampling was very, very low.
with the other tests, IMD was much lower using 24/96 sampling at these
was just about at the limit of our test equipment here, with multiple
frequencies at 24/96 sampling.
The DAC-1 is a major achievement. Far more than a taste-of-the-high-end
toy, it is a bona-fide audiophile product whose sound is astonishing for
its price. I would think that readers who own relatively inexpensive
one-piece CD players equipped with digital outs would find investing in a
DAC-1 plus a decent digital cable and power cable (for a total outlay of
$1100 - $1500) would deliver an entirely new dimension of sonic pleasure.
Similarly, those owning older, lower-priced DACs or less than stellar
preamps might find using the DAC-1 in stand-alone mode a revelation. Its
limitations, which are most noticeable when auditioned through equipment
that costs far more than the DAC-1, are relatively minor when compared to
its pluses. If your budget is small, but your love for music unbounded,
you owe the DAC-1 a listen.
- Jason Victor Serinus -
Digital Front End:
Sony 707ES transport modified by Alexander Peychev
Audio Alchemy DDS-Pro transport
Theta Gen. 5A single-ended DAC (to be replaced with the Gen.VIII);
Perpetual Technologies P-1A with Modwright modified Monolithic Power
Supply and Revelation Audio umbilical power cable
Bruce Moore 100W dual mono tube power amp with Electro-Harmonix KT-88s and
Siemens Cca tubes
Bruce Moore Companion III tube preamp with Electro-Harmonix gold pin 6922s
and Jan Philips 12AU7 equivalents;
Reflection Audio Om-1 Quantum battery-powered preamp in non-battery mode
Talon Khorus X speakers (with latest modifications)
Digital: Nordost Valhalla interconnects and digital interconnects
Nordost Valhalla bi-wired speaker cable
Elrod EPS-1, 2, and 3 and EPS Signature-2 on main chain plus
Harmonic Tech, Nordost, and AudioPrism Super Natural S2 elsewhere
PS Audio P600 Power Plant power synthesizer with MultiWave II
PS Audio Ultimate Outlet; PS Audio Power Ports
Michael Green Deluxe Ultrarack, Basic Racks, room treatment, and
Black Diamond Racing Cones
Inner tube, maple cutting boards, bags of sand
Shakti stones on Amp and Monolithic/P-1a
Bedini Quadra Beam Ultraclarifier
Audioprism Stoplight and Blacklight, Marigo Disc
Sheffield/XLO degmagnetiser and break-in disc and Ayre demagnetizing disc
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