Need Help "Short Circuit Measurement i not Valid"

[John Mulcahy]

Class D is problematic as the negative output is usually not grounded and won't be happy connected to ground.

 

[andro]

Well then you can probably say that it was due to the 1k working resistance. Since it is common practice in circuit development to separate the masses, I have done this. Of course it doesn't necessarily make sense in this application, at least not with 1k. I've only got a Class AB PA amp and I don't think I want to connect it to the circuit because something will probably break. Maybe I can get a hold on a Class A amp...
Thanks for the help and if anyone here wants to try the whole thing with a Class D amp I think that's good info.