I have also bad experience - poor sound from SA-400. Just recently I get on eBay Technics SA-400 receiver to use it in my study room. On auction receiver was marked as used&for parts only, but in working condition, with external On/Off switch (main switch S11 out of function) and with plugged ceramic fuse (???) 12.5A in the F601 (original 3.15A – main speaker fuse).
