I've just finished (more or less) my amp project based on the Truepath board, but can't say I'm 100% satified for the following reasons:
1) Even with DC offset set to 0v, the TP for me heats up too much (at idle), the heatsink (that it's sized for a 50+50W class AB amp) became noticeably warm compared to my amp1-b that is always freezing cold. The efficiency for me it's comparable to a class AB amp for the TP. Apart this it sounds good, but not tried yet on my reference system.
2)The toroids became very hot also, another sign to me for the power inefficiency of the system. After some minutes of running at very low volume i can't touch them!
I've got a faulty board? Or my digital multimeter it's disturbed by the switching signal and don't read correctly the DC offset (tomorrow i will try with the scope)? Experience from other users regarding the heat?
If there is not a solution i hope at least to be satisfied with the sound, i'll let you know.
Thank you very much.