Digital Processor Reviews

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Digital Processor ReviewsFloor Loudspeaker ReviewsHeadphone Reviews
February FollowUp RoundUp
John Atkinson  |  Feb 15, 2021  | 
When Stereophile publishes a followup review in the print magazine, we add it as a "child page" to the website reprint of the original coverage. We have recently done so with three significant products: the Magico M2 loudspeaker, the Linear Tube Audio Z10e tubed headphone amplifier/integrated amplifier, and the Okto Research dac8 PRO multichannel D/A processor.
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Digital Processor ReviewsSolid State Preamp Reviews
Ferrum Wandla D/A preamplifier
Herb Reichert  |  Jan 26, 2024  | 
I can roll out of bed and install a $10,000 phono cartridge while finishing my coffee, but I postpone DAC installations until I am in the exact right mood to handle the potential stress—especially DACs with a touch screen and a complex menu. To my delight, Ferrum Audio's new Wandla digital converter was completely stress-free to install. It took only minutes to connect the USB-C cable, the Cardas Audio Clear Beyond interconnects, and 24V DC power adapter.

Connecting the power adapter caused a power-switch symbol to appear on the front panel touch screen. The moment I touched it, I smiled like the Cheshire Cat, because I saw a USB-C symbol, a loudspeaker symbol, three dots in a box, and a volume control bargraph. That told me the Wandla recognized my chosen input and was waiting for a signal. All that remained was for my Roon Nucleus+ server to recognize and enable the new DAC, which it did without prodding or reprimand. For me, that was a wow moment, a good start to what promised to be an interesting review.

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Digital Processor ReviewsMiscellaneousPhono Preamp Reviews
FollowUp RoundUp
John Atkinson  |  Sep 14, 2020  | 
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.
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Digital Processor Reviews
GeerFab Audio D.BOB digital breakout box
Kalman Rubinson  |  Apr 27, 2020  | 
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.

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Digital Processor Reviews
Genesis Technologies Digital Lens
Robert Harley  |  Jul 25, 1996  | 
Let's say you play a CD on a poor-quality CD transport and store the digital audio data in a massive computer memory. You then repeat the process, but this time play the CD into the memory from the finest CD transport extant (say, the Mark Levinson No.31). A week later you feed the two sets of data from the massive memory into a digital processor and listen to the music. Would the CD transports' sonic signatures be removed from the signal? Could you hear a difference between the transports a week later?
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Digital Processor Reviews
Gold Note DS-10 D/A processor
Jason Victor Serinus  |  Jul 31, 2020  | 
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."
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Digital Processor ReviewsHeadphone Reviews
Grace Design m902 Reference D/A headphone amplifier
John Atkinson, Wes Phillips  |  Apr 23, 2006  | 
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.
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Digital Processor ReviewsGramophone DreamsHeadphone Reviews
Gramophone Dreams #28: PS Audio & HiFiMan
Herb Reichert  |  May 23, 2019  | 
Every time I review a digital-to-analog converter, my memory drifts to the spring of 1983, when the first Compact Discs arrived at Tower Records in New York City. They appeared in the opera section. Sitting next to big, thick boxed sets of opera LPs, these new discs looked truly compact. A few months later, boxed sets of popular opera LPs, in almost untouched condition, began selling in the Tower Annex for $1/disc.
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Digital Processor ReviewsGramophone Dreams
Gramophone Dreams #39: HoloAudio May D/A processor & Intona USB isolator
Herb Reichert  |  Jul 30, 2020  | 
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.
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Digital Processor ReviewsGramophone Dreams
Gramophone Dreams #40: Denafrips Terminator & Ares II
Herb Reichert  |  Aug 25, 2020  | 
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.
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Digital Processor ReviewsGramophone DreamsHeadphone Reviews
Gramophone Dreams #45: T+A Solitaire P headphones & HA 200 DAC-headphone amplifier
Herb Reichert  |  Jan 26, 2021  | 
What I categorize as mainstream, dealer-based, fancy-pants streamers and big-speakers audio is actually only the gold-plated tip of a gigantic asteroid-like monolith that extends (underground) from New York to Hong Kong, from the Arctic Circle to Antarctica.
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Digital Processor ReviewsGramophone Dreams
Gramophone Dreams #55: Mola Mola Tambaqui D/A processor
Herb Reichert  |  Dec 02, 2021  | 
Since the plague arrived, several of my closest audio friends have been chattering and bugging me constantly, not about masks, vaccines, Trump, or Biden but about Bruno Putzeys's digital-to-analog converter, the Mola Mola Tambaqui. They've been sending emails and texts like pesky kids:

"Herbie! Have you tried the Mola Mola? Come on man, what's taking you so long? Is Putzeys's DAC better than my MSB? Or the dCS Bartók? Or the HoloAudio May?"

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Digital Processor ReviewsGramophone Dreams
Gramophone Dreams #60: Denafrips Terminator Plus, Denafrips Gaia, HoloAudio Spring 3
Herb Reichert  |  May 03, 2022  | 
The week before Christmas, I invited my artist friend Joe to visit my studio to see my 2021 paintings. To spice the invitation, I told Joe that while he was looking he could audition the newest flagship DAC from Denafrips, the Terminator Plus.
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Digital Processor ReviewsGramophone Dreams
Gramophone Dreams #66: Audio-GD R7HE MK2 D/A processor
Herb Reichert  |  Oct 26, 2022  | 
Whenever I install a new, in-for-review DAC, after some amount of spaced-out not-listening listening I find myself just sitting there, being happy I got the damn thing working. Once I recover from the stress of installation, my brain begins, without prompting, to examine the character of sound coming out of my speakers.
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Digital Processor ReviewsGramophone Dreams
Gramophone Dreams #69: Trance Dancing on Maxwell Street & the Rotel DT-6000 "DAC Transport"
Herb Reichert  |  Jan 24, 2023  | 
Everyone knows I'm a lucky guy. I was born in Chicago in nineteen-hundred and forty-nine, and as far as I can tell, that was the perfect year to be born. I missed the war, plague, and Depression horrors of the first half of the 20th century, and I witnessed the art, music, and cinema inventions of the second half.
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