I set up a a one speaker system for announcements and karaoke at my family reunion. Maybe 30 people. Temp was in the low to mid 90's. After about 3 hrs there was a noticeable low level of distortion, then sporadic drop outs of the sound. At times the level would drop to about 1/3 or less. There is a multi-color LED for signal and limit. During operation the signal light would flash (as expected) but you could see a partial illumination of red as the green would ignite, but only at that instant. I thought maybe the heat was causing it to act up. The amp plate was very warm. The speaker was under a canopy, so no direct sun. I shut it down.
When I got home I took it inside and let it return to room temp, then connected up my laptop. Volume was about normal, I suppose, but the signal light was still doing the same (hint of red). Low level distortion still present from the get go.
Then.... zzzz wwrrrrrrzzz zzzkkkk (electrical buzzes and such) for about 3-4 secs and smoke poured out of the ports.
I was thinking input before the smoke happened, but now I think output.
Any ideas on what likely happened?
I am not an electronics wiz, nor do I have a o-scope (or know how to use one), but have done some component replacements in my time. Anyone have a similar experience with the 25P or similar?
Thanks for your help.
David
PS - I know that the likely answer will be "Send it to a professional" (and I most likely will), but I want to learn something here also.