AT527NC Amplifier
Performance
Features
Ergonomics
Value
AT524NC Amplifier
Performance
Features
Ergonomics
Value
PRICE $3,695, $2,595
AT A GLANCE
Plus
Very powerful
Natural and balanced
Made in the U.S.A.
Minus
LEDs are too bright
THE VERDICT
The days of looking down on Class D amps are over.
Two and a half years ago, I reviewed my first ATI amplifier, and to say I was impressed would be an understatement. The ATI Signature AT6005 five-channel amp set a new benchmark for its designer, Morris Kessler—to the point where he put his John Hancock on the faceplate.
Last year, S&V editor-at-large Bob Ankosko sat down with Kessler to talk about his design philosophy over the years, and the subject of Class D amps was broached. Kessler mentioned that his current designs were all Class A/B, but he was following the developments of Class D very closely—though the initial efforts in this area didn’t meet his high standards because frequency response varied greatly as the impedance of the speaker changed. He hinted at the time that he may have finally found a Class D solution that he could deem acceptable, which turned out to be the latest Hypex Ncore modules.
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