Monoblock power amplifiers seem to be moving in and out of my listening room faster than green-onion salsa from Chi-Chi's. Over the past six months I've had the Parasound Halo JC-1, the Halcro dm68, the Pass XA-160, the Musical Fidelity kW, and now these 300W (into 8 ohms), $4500-each beauties from Theta Digital. All of these amps sounded as different as they looked, which was no surprise; too bad the "measures the same, sounds the same" dogmatists remain open for business.
Eleven years ago, Threshold Corporation entered the high-end audio market with the first amplifier ever to use sliding bias (footnote 1) in its output stages. Some 10 years later, Threshold spawned another innovation: their so-called Stasis circuitry, which yielded the S-series amplifiers. The SA-1 and its lower-powered sister SA-2 are the latest from Threshold, and are the first Threshold amps to abandon sliding bias for straight class-A operation. Both use the Stasis circuit.
Prejudice is bad—whether it's directed at people, places, or things. You know how it goes: digital is "bright," analog is "warm," solid-state is "brittle and etched," tubes are "smooth and soft" dynamic drivers are "low-resolution," electrostats and planars are "high-resolution" copper wire is "smooth," silver is "bright," etc. While putting everything that crosses your path into one box or another makes life simpler and seemingly more organized, the truth, musical or otherwise, usually gets mutilated in the process. Not that we all don't have preferences—but those are not the same as prejudices.
"A guy's gotta carry a cow across a river. He's not strong enough, of course, so the only way he can do it is to cut the cow into pieces, carry them across a few at a time, and re-assemble the beast on the other side. When he's finished, he's got a cow on the other side of the river, but it's not exactly the same cow."
The auteur theory of the cinema, first described in the 1950s by François Truffaut, states that a great movie represents the artistic vision of one person, usually the director. Moviemaking may involve collaboration, but it cannot be done successfully by a committee. There has to be a single individual in charge, one whose sensitivity and world view is reflected in the movie. In the same sense that the author of a novel is telling a story through the medium of print, the director of a movie is telling a story through the medium of film.
"My car is supercharged, not turbocharged, so you see there's no throttle lag," explained Yves-Bernard André as he reversed at what seemed like 80mph up a narrow cobbled Paris street. "D'accord," I mumbled, afraid to loosen the white-knuckled grip I had on the passenger grab handles. Yves-Bernard's car may have been pointing the right way down the one-way street, but it was not actually traveling in that direction. Okay, so it was 2am and the good residents of the Dix-septième Arrondissement were busy stacking Zs (en français, "emplier les ronflements"). But I still didn't think we would've been able to explain the logic of the situation to the gendarmes (les flics, en français).