Quote:
Originally Posted by audio bill
While its output stage operates in Class AB mode, it uses a THX-patented feed-forward error correction circuit to virtually eliminate crossover distortion making it sound more like a pure Class A amp. It utilizes a Class H tracking switched mode power supply design which allows it to operate at an efficiency more typical of Class D amps at over 90%. Quite a unique design which offers an exceptional value.
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Feed-forward or feed-back, it all really amounts to the same thing. With feed-forward it's only the error signal that's inverted and re-injected into the signal path (x gain), so any advantages are more to do with the overall topology than with error correction methods.
That said, the AHB2 is a performer on the test bench that few amplifiers can touch.