Thanks for pointing the locations of the harmonics out, I did miss this. Seems that something is not right.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
I think AKSA was talking about the singleton (single transistor) input stage as having the better spread of harmonics than a differential pair. Quasi-complementary output stages also tend to produce more even harmonics than odd.
I think there is something wrong with your soundcard measurement procedure or settings though. I don't see the harmonics aligned correctly with the horizontal scale.
For dc stability see Mooly's amp My MOSFET amplifier designed for music. current feedback amps have far different architecture. See AD844 datasheet.