Mixing class A with Class D amps

December 17, 2021
 by Paul McGowan

2 comments on “Mixing class A with Class D amps”

  1. Questions like this indicate how little many audiophiles understand about amplifier classes. As far as I know, while it could be used else where, class D is as a practical audio device only used for power amplification.

    In an analogous vein, I always smile when I read ‘pure class A single ended’ in an audio review indicating the writer doesn’t really understand the relationship between single ended and class A.

  2. Peter Walker invented the QUAD 405 II current dumping amplifier in 1982. It had a high quality Class A driver stage and a high current Class B output stage. You got 100w (now about 140w) of low distortion sound – and it was CHEAP to make. 40 years and about 500,000 units later, they are still making them, and they are still cheap. These days you can do the same thing, just with Class D. I use one, it’s called ADH (Class A and D hybrid), basically the same thing. Prior to purchasing the ADH, I used QUAD current dumpers. It’s just a good way of getting lots of CHEAP low distortion power.

Leave a Reply

Stop by for a tour:
Mon-Fri, 8:30am-5pm MST

4865 Sterling Dr.
Boulder, CO 80301
1-800-PSAUDIO

Join the hi-fi family

Stop by for a tour:
4865 Sterling Dr.
Boulder, CO 80301

Join the hi-fi family

linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram