Solid State Preamp Reviews

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.

There's always a certain amount of jockeying for position at the very top of the High End. Every few months, a new star burns brightly, getting all the attention. While the constant turnover at the cutting edge helps to define the state of the art, audiophiles should keep their eyes on the longer term. It's a company's track record—examined over a period of years—which defines its position in the market and the credibility of its products.

With the introduction of the NHB-108 stereo amplifier, Swiss-based darTZeel quickly established a reputation for pristine, hand-built quality, fanciful industrial design, and elegant circuitry—all accompanied by a healthy jolt of sticker shock. (See John Marks' coverage in his September 2003 "Fifth Element" column, followed by Wes Phillips' full review in April 2005 .) The 100Wpc (into 8 ohms) NHB-108 costs more than $18,000. A lot of change for not a lot of power, but the reviews were unanimous in praising the amp's exceptional sound quality.

Klyne Audio Arts has an almost Zen-like approach to the design of its products. Like the best Japanese designs, Klyne's preamps are aesthetically pleasing in appearance, do exactly what they're supposed to, and their controls are not only where you would expect them to be, but have an almost sensually smooth action. Internal construction, too, is a work of art—the kind of design which, transferred to a tapestry, would grace the wall of any listening room. You have to see the insides of a Klyne preamp to appreciate how attractive-looking an audio component can be. But physical beauty is only one aspect of Stan Klyne's designs; of all the electronics manufacturers I know of, Klyne Audio Arts also makes products more adjustable than any others, so as to appeal to the needs of what I call compulsive tweaks.

The P-8 ($11,000) is the second of Simaudio's Moon Evolution series that has passed through my system, following on the heels of the Moon Evolution W-8 power amplifier, which I reviewed in March 2006. Fortunately, the P-8's arrival preceded the W-8's departure, so I was able to use them together as well as with other components.

I've had the pleasure of using The Direct Line Stage Line Stage (originally called the Director) from Ron Sutherland for the past few months. This active line-stage preamp (it has no phono section) is available from Acoustic Sounds for $3000.