JVC MX-KB4 CD Shelf System "stereo speakers smoking" Questions

Stereo blew out I turned mine up all the way and it made a crackling noise and then and started smoking and now only the main speaker works and not the subwoofer Ok...and your question is what? How do

...stereo turns on and then says protect and turns off.I have disconnected the speakers and still happening..How can I fix this? The protect feature is intended to guard against a more severe problem ...

...Stereo Receiver Vector Research Several sites I found all put the thing around mid to late 1980's manufacture, but I couldn't find a manual either. As to the original problem: If the previous owner ...