Hi finally got my M&K KX10BK SubWoofer fixed of sorts, sounds great again no thanks to the hours of messing about with fake transistor, the only problem I have now is how does the circuit mute the speaker as I get a nice thump every time days gone by a relay was used, I have noticed with no speaker connected the DC offset which ideally should be 0 Volt but Its about .235 volt there is no means to adjust this with an offset preset, it appears it may be that I need all match pairs of transistors but I struggled enough getting non fake ones as I was.
I just wondered if anyone else had similar problems.
I just wondered if anyone else had similar problems.