Historical

This is something we don't see too often: an entirely new approach to power amplifier design. As Quad points out in its literature for the 405, class-A operation of transistors provides the lowest distortion, but drastically limits the amount of power an output transistor can deliver without overheating. (Most transistor amps use class-AB output operation, in which each of a pair of power transistors handles part of each signal cycle and shuts down during the other part. Imperfect synchronism between the two halves causes the familiar "crossover distortion," which accounts for most solid-state sound. In class-A operation, each output transistor draws current though the entirety of each signal cycle, eliminating the crossover transition but doubling the amount of time current is drawn, and thus tending to cause the transistor to heat up more.)

Ralph died last week (September 11, 1991), his great and faithful heart stopped in the aftermath of an affliction not too uncommon for older, larger dogs—a gastric torsion. He was approximately 12 years old.

[Note - this article is from the May, 1963 issue of Stereophile]

Many readers have asked why we don't maintain a permanent listing in each issue of The Stereophile of those components that we feel to be the best available, with or without qualification.

So, we are following our readers' suggestion, and will list in each issue groups of components which, at publication time, we feel are ones from which our readers would be well advised to assemble their systems. The list will change from time to time, as new products appear, old ones are obsoleted, or manufacturers change their quality control standards. Components will be added to or dropped from the list without advance notice if we see adequate reason for doing so, but each change in the list will be explained in the magazine at the time the change is made.

The Swiss-made G-36 recorder had earned an enviable reputation among perfectionists during the few years that it has been available in the US, and our inability to test one (because of a backlog of other components for testing) became increasingly frustrating to us with each glowing report we heard from subscribers who owned them. Now that we have finally obtained one through the courtesy of ELPA (footnote 1), we can see what all the shouting was about, but we also have some reservations about it.

One of the less-glamorous speaker systems around today, these have more to offer the critical listener in terms of satisfaction than do most of the more-exotic designs.

Our long-awaited laser-audio disc player (usually called the CD, for "Compact Disc") finally arrived, along with a real bonanza of software: two discs—a Polygram classical sampler of material from Decca, Deutsche Grammophon and Philips, and a Japanese CBS recording of Bruckner's 4th Symphony, with Kubelik.

The title of this month's column is the legend Sheffield Labs emblazoned on a T-shirt a couple of years ago, to promote their jaundiced view of digital audio. Since then, even Sheffield's reactionary perfectionists softpedalled their anti-digital crusade, perhaps because of the number of CDs they've been selling! Their personnel no longer wear those T-shirts at CES, which is unfortunate. Although most people in the audio field no longer see digital audio as madness, digital denouncing is still very much with us.