LATEST ADDITIONS

Pauline Oliveros calls it "deep listening"—a way to pay attention to the sensual qualities of sound itself. Welcome to a world of music that defies categorization, that invites a listener to soak slowly into a deep and otherworldly zone. This music goes by many names: ambient, spacemusic, electronica, sacred music, tribal/trance. Alas, you'll often find it hiding in the New Age section. Unlike some fluffier New Age fare, good ambient albums can explore the deeper, more solitary spaces. At its best, ambient music can sensitize you to sound in unique ways. It can enlarge your listening space to cavernous dimensions, paint hallucinogenic sonic landscapes, summon primordial forces, or enshroud you in clouds of diffuse vapor.

So where and on exactly what should you plunk your precious audiophile components when you get them home? And why even bother?

While decidedly "niche products," as Martin Colloms describes them, single-ended (SE) tube amplifiers have still found a happy home in many audiophile systems. But a trap awaits those who wish to evaluate the differences between an SE and a solid-state or push-pull tube amplifier, or between two SE amps. In "The Unseen Variable," Colloms digs to the bottom of this complicated matter.