I might be posting this in the wrong section, if so plz tell me. I recently was given a Pioneer SM-3000 amp. I have no experience with amps or audio equitment in general, so please bare with me. I attatched both speakers to A and did the same with the dial on the front. But when turning on the amp with no input coming in the left speaker smoked and is now blown. the right works completey fine. I have blown two speakers this way. I took the amp apart and did not see any noticeable damage. What could this be? The right speaker works as expected and plays music fine.