So here I am expounding on the tendency of audio components---especially tubes, capacitors, and resistors---to become microphonic, and you're wondering how you can find out if there's any of that shakin' goin' on in your system. And you want to do it easily and for next to nothing. The first thing you do, then, is listen carefully to Victor Tiscareno of AudoPrism. The following is his big idea, and a damn good one it is.
Recently I found myself on the phone with Linn's chief design engineer, Bill Miller, talking about switch-mode power supplies. Affable Mr. Miller was ensconced in Linn HQ in Glasgow, Scotland. After a bit I inquired if Head Man Ivor Tiefenbrun was about the manse, and was quickly handed over. "You're such a cheeky guy. Why'd you call it the Klimax?"
One room at the 1999 CES in Las Vegas that knocked me for a loop was the Avalon/Classé installation mentioned in my April show report. Classé had just debuted the Omega preamp, the companion piece to the Omega amplifier I reviewed in March. It proved a very suave, musical, and high-performance marriage.
Now that we've gained a basic understanding of speaker setup, cable dressing and hygiene, and electrical theory, it's time to consider where and how to site your equipment. I've seen all sorts of weird, jerry-rigged shelves and poor component placement, some of the worst in pricey systems whose owners really should have known better. But you can achieve a stunning level of improvement from a haphazardly set-up system---even an entry-level one---when it's rearranged so as to let the components breathe.
Sometimes you have to sweat the details, sometimes they just fall in your lap. Take Victor Tiscareno. Victor's company, AudioPrism, has been making electronics, accessories, and power-conditioning products for quite some time. While he was visiting and installing a pair of his Mana Reference tube amplifiers for an upcoming review, Victor and I got to talking about power---the kind that comes out of the wall. Victor studied electrical engineering and is very au courant in such matters. During these ruminations he shared with me a recipe for what he calls The Poor Man's Dedicated Line.
Nagra's VPA amplification system consists of two slim, handsome monoblock amplifiers intended for vertical placement. They look good adjacent to the speakers. However, two 845 tubes put out a lot of heat, so the amplifier should be at least a foot away from your speakers...unless you're looking for a nice crackle finish.
Last month (click here for previous Fine Tunes) I tipped you on how to check the AC plug orientation for transformer current leakage—the best sound is often found at the lowest voltmeter reading. Roger Skoff of XLO suggests another technique that's worth passing on to you, if only because the imagery is so . . . piquant: Leave the speaker cables hooked up and pull the interconnects from the power amplifier. Turn it on and "stick your head in the speaker," as Roger puts it, checking for the level of hum. (Imagine a pair of bony audiophile legs waving crazily out of the bell of an Avantgarde Acoustics horn speaker.)