There has been a lot of discussion and questions asked on the forum about Class D amplifiers. Here is the lowdown, posted by a local authority on the technology, Pierre Watts. Pierre hasn't posted here for a long time (these posts data back to 2006). I'm re-posting his content here, as it seems to have gotten lost over time.
Original posts here:
Class D explained, Part I
Class D explained, Part II
Original posts here:
Class D explained, Part I
Class D explained, Part II
