Hi, I have a Technics SX PR603 electric piano which has started giving me a bit of a headache. The sound is fine when I plug in headphones but its buzzy and distorted through the speakers. Obviously, this suggests that the pre-amp section of the board is fine, and the problem lies with the amp side. Its as if that side is not receiving sufficient power to drive the amp. I have tested the speakers and the tweeters separately and they are working fine. I was wondering whether anyone has come across a similar scenario. Any ideas about the possible culprit (capacitor, transistor, resistor, etc) will be great. Thanks.
Regards
SoundMaster
Regards
SoundMaster