Digital Processor Reviews

It wasn't long ago that bottom-shelf DACs had this dry, gray, punchy, grainy sound, emerging from a weird mechanical clarity. Their sound reminded me of cheap whisky. The ones that didn't sound like $1 shots replaced the dry grain with some blurry gel. No vitality. No subtle contrasts. No nuance. No air. No atmospherics, no reverberance, and nothing I would call transparency.

Digital's rapidly evolving technology made the next wave of DACs sound strikingly clear and quiet, with some touchy-feely hints of wetness to suggest a more natural transparency. Unfortunately, most of these newfangled wet DACs sounded like distilled water tastes.

For me, digital transparency didn't become truly wet, colorful, or naturalistic until I discovered NOS R-2R converters, which made midlevel four-figure DACs, like my Denafrips and HoloAudio, sound like bits bathed in luminosity. Very relaxed. Grainless. Ektachrome.

When Stereophile publishes followup reviews of various kinds in the print magazine, we add the followup as a "child page" to the full review. That means that they don't appear on the website's home page and might get missed. The October 2020 issue included three followups: of the Boulder 2108 phono preamplifier, the Weiss DAC502 D/A processor, and the IsoAcoustics Gaia loudspeaker isolation feet.

This unique device is a solution to a problem that previously couldn't be solved.

There are, of course, any number of little boxes that can extract audio from the HDMI video bitstream; they began to appear on the market to fill a need for a way to route audio from a player's HDMI output In the recent past, you could buy a good-quality—even audiophile-grade—universal player and listen to SACDs via its good-sounding analog outputs. But good-sounding universal players are becoming scarce.

I felt like I'd just been offered a choice of 31 flavors of Baskin-Robbins ice cream topped with up to 57 varieties of Heinz ketchup, 57 condiments, and 47 brands of coddled cream. My head began to spin, my stomach churned, and my mouth grew very dry as I read that Gold Note's DS-10 ($2995) was a "chameleon DAC" with 192 setup options that enable it to "completely blend in with different music genres, giving the listener the opportunity to adapt the behavior of the unit to the music playing, to one's stereo system and, most of all, to the listener's taste."

In his bimonthly column, "The Fifth Element," John Marks has tried to identify pro-audio components that would be of interest to audiophiles. In his June 2005 episode, John wrote about Grace Design's m902 D/A headphone amplifier ($1695), the Colorado company's replacement for the 901, which had long been a favorite of his. Changes include: the handling of single-wire sample rates of up to 192kHz; unbalanced analog outputs, controlled by the front volume control, to allow the unit to be used as a preamplifier; a cross-feed processing circuit licensed from www.meier-audio.de; power-supply revisions; and the provision of a USB digital input, in addition to S/PDIF, AES/EBU, and TosLink.

In contrast to phono cartridges and analog tape recorders, digital audio converters distinguish themselves by the fact that they can be fashioned in an almost infinite number of ways. Therefore, the odds against two manufacturers' DACs or ADCs sounding exactly the same are extremely large.

I am fascinated by DACs and the shifting sands of today's digital-audio marketplace. This month, I am reporting on two more DACs, both made by Denafrips: the $4498 Terminator, until recently their flagship DAC, and the $768 Ares II, the company's least expensive model. Like the HoloAudio May DAC I described last month, both Denafrips converters employ R-2R conversion schemes, and both render recordings into direct, unprocessed sound.