High-Efficiency Non-Switching Amp from THX
Why this should be so falls into the area of engineering I define as "then a miracle happens," but Laurie demonstrated a prototype 400Wpc (into 8 ohms) amplifier running off six lithium-iron cells driving Sonus Faber Cremona speakers. (Source was a Mac mini feeding a Benchmark DAC1 Pre. It played plenty loud, with excellent dynamics and the chassis barely got warm. "This is what I want in an amplifier," said Fincham, "it's like a car with a really big engine." And unlike a class-D amplifier, where the THD tends to increase in the top octaves, the THX amplifier is said to be almost as linear at 20kHz as it is at 1kHz.
THX will be licensing the topology to amplifier manufacturers who are looking for an amplifier that sips juice from the wall but without having to pay a performance penalty.