Integrated Amp Reviews

As with so many other things, from cell phones to soy milk, the idea of a portable MP3 player was something I at first disdained, only to later embrace with the fervor of any reformed sinner. But not so the idea of a high-fidelity iPod dock: Given that I now carry around several hundred high-resolution AIFF files on my own Apple iPod Touch, the usefulness of a compatible transport seemed obvious from the start. Look at it this way: In 1970, whenever I bought a music recording, I could enjoy it on any player, in any room in the house. In 2010, why shouldn't I enjoy at least that degree of convenience and flexibility—without resorting to a pair of tinny, uncomfortable earbuds?

I'm a basically a tube guy, but I've never warmed up to most lower-powered integrated tube amps. Although I quite enjoyed the time I spent with the Cayin A-50T, which I reviewed in the March 2008 issue of Stereophile, over the years I've typically found I'd rather spend time with mid-priced, solid-state integrateds from Creek, Musical Fidelity, or Simaudio than deal with the loss of definition at the frequency extremes that I've heard from many lower-powered tube models. So it was with a bit of trepidation that I approached the VSi60, a 50Wpc integrated amplifier from Audio Research Corporation.

An audio/video receiver in Stereophile? Heresy!

There's a fantastic new two-SACD/CD set of a demonstration-quality live recording of a rather obscure work you really should get to know, not only for its own merits, but also for what I believe is its underappreciated but major influence on music and on popular culture. The piece is by 20th-century composer Arnold Schoenberg, but trust me—it's more than "listenable." It (or, at least, the music on the first disc) is beyond engaging; it is compelling—a revelation, even. The work is Gurrelieder (Songs of Gurre), Gurre being a castle in medieval Denmark that was the setting of a real-life doomed love triangle, the story of which has since loomed large in the moodily brooding artistic consciousness of Danes. The 19th-century Danish poet Jens Peter Jacobsen wrote a collection of poems based on medieval legends, including this one, and a German translation by Robert Franz Arnold provided Schoenberg's dramatic texts.

In an industry whose newest products are often as discouragingly unaffordable as they are short of the sonic mark, the Naim Audio Uniti ($3795) stands out. In a single reasonably sized box, the Uniti combines the guts of Naim's Nait 5i integrated amplifier and CD5i CD player with various additional sources: an FM/DAB tuner, and interfaces for an iPod, a USB memory stick, an iRadio, and a UPnP-compatible connected computer or server—all for the price of a very good television set.

A decade ago, many predicted that amplifiers with switching or class-D output stages would come to dominate high-end audio. In a post–Peak Oil world in which the price of energy would always continue to rise, a class-D amplifier's very high efficiency in converting AC from the wall outlet into speaker-driving power would be a killer benefit. Although a conventional push-pull class-B amplifier has a theoretical efficiency of 78.5%, which would seem usefully high, this efficiency is obtained only at the onset of clipping; the need for the output devices to carry a standing bias current reduces that efficiency considerably, typically to around 50%. Class-A amplifiers are even less efficient, with a maximum of 25%; ie, three times as much power is dissipated by the amplifier as waste heat as is used to drive the loudspeaker (see "Sam's Space" in this issue).

There have been lots of great, and even some fabulous books of music criticism or reportage, and I've recommended several in these pages. So far, however, only one has made me chuckle, chortle, or laugh out loud, time and time again.