Originally Posted by Kimeran
Not to bring back a dead thread here but this is a question that is related and I didnt want to start another thread to clutter the forums.
When you are looking at your mains what are the major differences between Class A and Class D?
Wrong question. Class A and AB are so different from class D that the easier question to answer is: "How are "Class A and Class D the same?"
The answer is: Other than that they accept an analog signal, output a hopefully more powerful analog signal, and accept DC power to do it, there are almost no similarities.
After that, figure out which one interests you more, and look it up with google. There are tons of articles about each on the web. Come back and ask any questions that you may have after thoroughly studying the existing documentation.
I understand that Class A is more linear but obviously much less efficient.
Audiophile myth. It turns out that Class AB with optimally chosen bias is the most linear. Class A is just Class AB with suboptimal bias causing more distortion and poorer efficiency than would be necessary.
However, I also have heard that Class D can handle the dynamics better.
Audiophile myth. Class D is more efficient. But, handling dynamics is more a matter of linearity. We live in a world which by hifi standards has no lack of power, so efficienct use of power is secondary. Class AB is the most linear and offers the best frequency response. That's true today. Once Class D is more fully developed, it will probably be superior on all grounds.
I read my first articles about Class D in the 1960s, and since then it has been limited by the slow rate of development of solid state technology. Class D mostly progresses based on the power and speed of switching transistors which is subject to slow improvement.
I am really curious because I am between building something with the nCore modules or FirstWatt F5.
You can always tell pioneers by the arrows sticking out of their backs. ;-)