Solid State Preamp Reviews

Most of this column is dedicated to two hi-fi products for the masses—not from Lvov, via Vladimir Lamm, of Lamm Industries; or from Leningrad, via Victor Khomenko, of Balanced Audio Technologies; nor from any other Soviet-born audio hero. (Neither Vladimir nor Victor is on the list of "Name of Russia" contenders for greatest Russian of all time.) Nor from any consumer audio company, but from the world of professional audio. An Iron Curtain almost separates the two.

In my February 2000 review of Meridian's multi-talented, multichannel, multi-kilobuck Digital Theatre system, I fumed about the lack of a medium for discrete multichannel music. Even more loudly, I railed against the irresponsible mastering of many Dolby Digital and DTS discs, which place the listener in the middle of an ensemble and swirl the voices around his or her head with little concern for musical or artistic coherence.

I can't think of a product that was as eagerly anticipated as was Ayre's KX-R preamplifier ($18,500). Following in the footsteps of Ayre's MX-R monoblock amplifier, a Stereophile 2007 Product of the Year, and milled, like the MX-R, from a 75-lb billet of aluminum, the KX-R also shares with its monoblock stablemate the Ayre ethos of zero feedback and fully balanced operation. But what really caused the buzz was the declaration by Ayre founder and chief designer Charles Hansen that the KX-R, with its use of a technology he calls Variable Gain Transconductance (VGT) to control the volume, would set new standards for signal/noise ratio.

When David Hafler sold his Hafler and Acoustat companies to in-car audio manufacturer Rockford-Fosgate a year or so back, things went quiet for a while as the new owners made arrangements to transfer production of both brands to their Arizona facility and took stock of where their new acquisitions stood in the marketplace. Then, at the 1989 CES in Las Vegas, the company made a reasonably sized splash with the first in a new range of Hafler products intended to lift the brand out of the hobbyist-oriented identity it had, perhaps inadvertently, adopted in the last few years.

I'm old enough to remember my family's first table radio that was made out of plastic. It was cream-colored, and it sat on the rearmost edge of our kitchen table: a less-than-timeless design in its own right, destined to be discarded at the end of one era and treasured again at the dawn of another, for more or less the same reason. But in 1958, a cream-colored plastic radio looked fresh, clean, and right, and its cheap wooden predecessor seemed dowdy and sad by comparison. That would all change in later years, of course. Then it would all change again.

Boulder Amplifiers, named after the Colorado town where the company has resided since its founding 23 years ago, makes some of the most elegant-looking solid-state amps around. Chassis are anodized, aircraft-grade aluminum with rounded edges, machined and finished in-house. The two models reviewed here, the 810 line preamplifier and the 860 power amplifier, each have a sleek, compact build—stacked atop each other, the two stand just over a foot high—owing to extremely efficient packing of the circuitry inside. These are the company's "entry-level" electronics, but there's nothing cheap about them—the preamp retails for $6900, the amp for $8500—and for all their economical size, they look like luxury goods as well.