Features

We're all involved with the world we live in. Friends from 20 years ago? Hey, nice to see ya, put on a little weight I see. Generally, you hang with your crew, although you might miss the bigger picture that way.

I wrote for Stereophile from 1993 through 2002, and I remember my experiences fondly, including the pure pleasure of listening to music on all that wonderful audio equipment. But I hung with my tribe and never fully appreciated the crucible in which Stereophile was formed. It's a genuine saga; cue Ennio Morricone's soundtrack to Once Upon a Time in the West.

Book Review: Audio Research: Making the Music Glow
Written by Ken Kessler, designed by Henry Nolan. 220pp. $150. Available at Audio Research dealers and online at audioresearch.com.

I never met Audio Research Corporation founder William Zane Johnson, who died in 2011. But when he founded his now-legendary company in 1970, I and my ragged troupe of Dynaco modifiers were in the trenches, fighting the sand-warrior hordes during the first transistor onslaught.

99% True: Almost a National Bestseller, by Paul McGowan. Lioncrest Publishing, 2019. 364pp. $25.00, hard cover; $15.99, paperback; $9.99, Kindle e-book.

To many audiophiles, high-end audio manufacturers must seem like monolithic entities, enduring for what seems like forever, like cliffs beside a familiar path. But as Paul McGowan explains in this unputdownable autobiography (footnote 1), behind the facade of stability things can be in financial turmoil, with success equally as risky as failure.

If there's one thing audiophiles agree on, it's that snake oil is bad—even if they can't agree about what snake oil actually is.

In audio, snake oil means fake science or fake technology—anything that's claimed to improve the sound of a system but that looks like an obvious rip-off. For some people, expensive speaker cables and interconnects are snake oil. A few objectivists consider AC power treatments snake oil: most modern audio components, after all, can correct for AC line-voltage flaws and reject "ripple" in a power supply's output. A handful of hard-core objectivists maintain that every new digital technology since the advent of the Compact Disc is snake oil.

The most notable aspect of Benchmark Media Systems' DAC3 HGC ($2195), which I favorably reviewed in the November 2017 Stereophile (footnote 1), is its low noise floor. John Atkinson's measurements corroborated Benchmark's claim that the DAC3 is capable of "at least" 21-bit performance. While significantly less than the theoretical potential of a 24-bit data format, 21 bits is still the state of the art, and corresponds to a dynamic range—the ratio of the highest achievable digital-domain volume to the DAC's internal noise—of 128dB. That's well above the dynamic range that most power amplifiers can achieve. A good-measuring high-end solid-state amplifier is likely to have a dynamic range—the highest attainable ratio of signal to noise—of about 100dB ref. its maximum power.

The right thing at the wrong time is the wrong thing.—Joshua Harris

The sampling theory formulated by Claude Shannon in the late 1940s had a key requirement: The signal to be sampled must be band-limited—that is, it must have an absolute upper-frequency limit. With that single constraint, Shannon's work yields a remarkable result: If you sample at twice that rate—two samples per period for the highest frequency the signal contains—you can reproduce that signal perfectly. Perfectly. That result set the foundation for digital audio, right up to the present. Cue the music.