Well, I have replaced the TDA7265 by a brand new one (~€4), but the DC offset of approx. 150mV is still there...
Now I am a bit puzzled, because its inputs are AC coupled and there is no means (as far as I understand) to tune the power stage bias, see below application circuit, which is almost 1:1 implemented in the Teufel amplifier.
Anyone advice or suggestions? Thanks!