Powerline Accessory Reviews

Some of our readers seem to believe that the essence of high-quality audio is disclosed primarily by science, and not by dreamy, bodice-ripping adventures that take place on plush carpets behind closed doors. Perhaps they're right. Unfortunately, I have had no personal experiences that confirm that hypothesis.

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.

There never seem to be enough AC outlets, and when there are, they're not always easily accessible. I have two dedicated 15A duplex outlets at the power-amp end of my room, but a subwoofer and multiple power amps (up to three at a time) exhaust those facilities. What happens when I need to add a second subwoofer or other EQ? What do I do when I want to keep more than three amps cooking for quick comparisons?

She responds as expected to the only sound: hysterical voices!—Brian Eno

Determining whether an idea is brilliant or off the wall is often a matter of perspective—and of looking at the results that follow from the idea. Take the notion of AC regeneration. AC is what comes from the wall socket, courtesy a network of power-generation plants, and it's specified as having a certain voltage and frequency, with the amount of current limited by fuses or circuit breakers in the electrical panel of the house or apartment. Audio components—other than those powered by batteries—are designed to convert this alternating current (AC) to direct current (DC), then produce variable AC that drives the speakers to produce a facsimile of that signal. In short, AC provides the raw material used by audio components to do their job.

Tweaks come and go. When a new one creates a buzz in audiophile circles, I generally prefer to wait and see if it's still around after the initial excitement has subsided. I'd heard about "audiophile" fuses some time ago, and although the likelihood of them making a significant difference didn't seem as farfetched as such tweaks as the "intelligent chip" or the "clever little clock," I didn't feel inclined to try them. I was persuaded otherwise by the confluence of two separate influences: a report by Michael Fremer, in the February 2007 Stereophile, that the HiFi-Tuning fuses produced a "subtle but noticeable" improvement in the sound of his Musical Fidelity kWP preamplifier; and an encounter at the 2007 Consumer Electronics Show with Robert Stein of importer Ultra Systems (the HiFi-Tuning fuses are made in Germany), who said that they produced a big improvement and offered to send me some samples.

Power-line conditioning and exotic power cords, once considered the lunatic fringe of tweaking, have become normal parts of audiophile life. Over the last several years Shunyata Research, founded by former NSA research scientist Caelin Gabriel, has established itself as a leading innovator in the area. The company's latest efforts include the Hydra Model 8 power-distribution center ($1995), for use with whole systems or front ends; the two-outlet "mini" Hydra Model 2 ($395), intended for use with power amplifiers; and the Anaconda Alpha and Anaconda vX power cords ($1995), the new top models in the PowerSnakes line.