What did I break?

I accidentally connected the outputs of two amplifiers together. The Hitachi is toast, and will be remember fondly.

The Sony plate amp is wounded. It only has high-level inputs. The subwoofer still works but one channel on the pass-through outputs has failed. A speaker connected to this channel is very quiet (sounds like it's been shorted).

What am I likely to have blown? Is it worth repairing?
 
We need to see what you are measuring.


I don't know what you want me to sketch. And I don't know how to upload an image.

I have four bare wire inputs and four bare wire outputs. I know the Sony plate amp is working because sub works from when provided with a signal to either channel. I assume both sides of the amp work because the volume increases when a stereo signal is offered.


The problem is with the external (pass through) outputs. The right-channel operates correctly. The left channel has a severely reduced output. But the amplification for these outputs is provided by the original JVC amplifier. The JVC Amplifier has been checked and both sides function correctly.



I was hoping somebody could tell me I'd probably melted a resistor or something because surely a high-level pass-through circuit can't be that complicated.

The problem is circumvented by wiring the satellites directly to the JVC amp with the signal passing through the Sony. I just don't want to set my house on fire.