LATEST ADDITIONS

One
Everything makes a difference. Everything. File that away.

Two
There are two kinds of good sound: good sound sound and good music sound. While I could describe the distinction in few words or many, it's easier to point to two recordings of Elgar's oratorio The Dream of Gerontius: by Sir Adrian Boult and the New Philharmonia Orchestra, with tenor Nicolai Gedda singing the title role (2 LPs, EMI SLS 987); and by Malcolm Sargent and the Liverpool Philharmonic Orchestra, with Heddle Nash in the lead (2 LPs, EMI RLS 709).

Editor's Note: One-bit DAC chips in the 21st century, where the analog output signal is reconstructed from a very high-rate stream of pulses, are ubiquitous. But a quarter-century ago, those chips were only just beginning to stream from the chip foundries. In this feature, we aggregate Stereophile's 1989 coverage of the then-new technology, starting with Peter van Willenswaard on the basics.—John Atkinson.

1989 may well become the year of the D/A converter (DAC). CD-player manufacturers have, almost without exception, launched research projects focusing on this problem area of digital audio; many of these projects are already a year old. This is, however, by no means the only imperfection keeping us away from the high-quality sound we have come to suspect is possible with digital audio media, and maybe not even the most important.

By the time you read this, in the fall of 1967, the "Dolby system" will probably be old hat to you. Every other audio publication has been describing it, discussing it, and hailing it as the greatest invention since sex.

We've seen that kind of press ballyhoo before, about such significant advances as the Edsel, the 16-rpm LP and the "thin-profile" loudspeaker, so our first inclination was to be a wee bit skeptical of the Dolby. It seemed too good to be true.

In 1999, I visited a friend, professor of Italian history Bill Adams, at his castle lair in the mountain village of Panzano, in Chianti, Italy. The 10th-century Castello di Panzano towers over the lush Tuscan hills, offering stupendous views. Each morning we'd walk down the mountain to the town below, where squat old men drank espresso and watched soccer at the all-in-one café/general store/post office. We toured the Roman ruins at Volterra and San Gimignano, gorged ourselves on pasta, and admired the fashionable young women.

It would be an understatement to say that in 2001, when Nordost introduced their original Valhalla cables, they were a revelation for me. Their focus and resolution of detail were like nothing I'd ever heard, and revealed in recorded performances a startling energy and realism. Throw in their seemingly absolute transparency, and similarly unique levels of spatial and temporal precision, and the Valhallas established a new standard of sound quality in audio cables. Although their tonal balance was cool, as I reported in my first review of them in the November 2001 issue, they were the only game in town in terms of reproducing the feel of a live performance. I immediately adopted them as a reference cable, and they remain a reference for me today.

Life is too short to put up with poor-sounding headphones, I mused the other morning, during my 60-minute commute on the NYC subway. All around me, straphangers gripped smartphones and listened to multicolored Beats, noise-canceling Boses, white Apple earbuds, and, only rarely, Sennheisers and Grados.

Stereophile hasn't reviewed a PS Audio power regenerator since February 2009, when Robert Deutsch tried the company's then-flagship, the Power Plant Premier ($2195). But earlier this year, as I prepared to write my review of PS Audio's NuWave DSD DAC (published in the May 2016 issue), a perfect opportunity to revisit the line came about: I read, in the owner's manual for the PSA DAC, that "power conditioners and the quality of the AC power can make a significant difference in sound quality." Eager to help the NuWave DSD put its best foot forward, I asked PS Audio to assist me in dealing with my AC power, which is marginal here in crowded New York City. They sent me their PerfectWave P10 Power Plant AC Regenerator ($4999)—and John Atkinson asked me to spill some ink on this most recent of the company's clean-power flagships.