Talk about a Scarlet Letter. The term class-D amplification, which describes PS Audio’s new M1200 monoblocks, exists only because another amplifier innovation had already parked in the “C” space. Soon after appearing in high-performance audio gear, class-D became synonymous with “digital amplification” in part because, like early CDs, many listeners found the sound glary, hard, and unpleasant. Besides, class-D is related to “pulse width modulation” and requires a low-pass filter to block high-frequency pulses—that sure sounds digital. But they’re not (see sidebar, p.85).
To this day, many audio enthusiasts remain unconvinced by class-D technology. Why?
According to Bruno Putzeys, one of the format’s leading innovators, “a high-performance class-D amplifier contradicts every single item of audiophile superstition. Designing one is the ultimate test to see if you’ve got your head screwed on right.”1 Maybe that’s why. Judging by this powerful amplifier’s sonic performance, Stellar M1200 designer Darren Myers definitely has his head “screwed on right”!
Putzeys also said, in the same interview with Sound & Vision’s Bob Ankosko, that “there are a few distortion mechanisms conspicuously missing in class-D, mostly those related to the input stage of a class-A(B) solid state amplifier and nonlinear capacitances” that are also “missing in valve [tube] amplifiers.” This newfangled technology, then, has much in common with old-school tubes.
Denne historien er fra January 2021-utgaven av Stereophile.
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Denne historien er fra January 2021-utgaven av Stereophile.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
Allerede abonnent? Logg på
Louis in London
No jazz-centric visit to New York City is complete without a trek out to Queens. At 46th Street in Sunnyside stands the apartment building where famed cornetist Leon Bismark \"Bix\" Beiderbecke's alcoholism finally killed him in 1931.
Believing in bricks and mortar
North Carolina hi-fi dealer Audio Advice has been busy lately.
Musical Fidelity AI
In 1989, I bought my second pair of Rogers LS3/5a's from a guy on Staten Island who had them hooked up to a Musical Fidelity AI integrated amplifier.
Burmester 218
As much as I tinkered with a little crystal radio as a child and started reading stereo magazines in high school, it wasn't until my early 30s that I half-stumbled into the higher end of the hi-fi sphere.
Bowers & Wilkins 805 D4 Signature
The \"Bowers\" in the name of British manufacturer Bowers & Wilkins (B&W) refers to founder John Bowers, whom I got to know fairly well before he passed in 1987.
Hegel H400
STREAMING INTEGRATED AMPLIFIER
SVS Ultra Evolution Pinnacle
How many times have you been told by parents and teachers that everything successful must be built on a strong foundation?
RECOMMENDED RC2024 COMPONENTS
Every product listed here has been reviewed in Stereophile. Everything on the list, regardless of rating, is genuinely recommendable.
Paging Dr. Löfgren
It started one evening when I was killing time watching YouTube videos and stumbled across a 2017 talk given by Jonathan Carr, Lyra's brilliant cartridge designer.'
Music among the Fairchildren
Pull down the shades, find a comfortable seat, and come with me on an imaginary journey to the year 1956. The Eisenhower-Nixon ticket wins reelection, the United Methodist Church begins to ordain women, and a can of Campbell's tomato soup costs 10 cents.
