Crown DC 300a Power Amp
My DC-300a did great but it was in the vinyl end cap wrapped early Crown cabinet. I would intentionally drive the hell out of it for an hour or so in the morning and when it reached thermal shutdown, I knew it was time to hop on the bike and pedal to campus. Never missed a beat.
Then when I moved to St Louis for a year I couldn’t have my rig at my place so I let my high school bud keep it. We talked, he said it would only play for a few minutes shut off and come back on later. One of the output wires was shorting on the left channel. Made the amp hot on the left 1½” to thermal shutdown. Corrected the problem and the amp was back to its old self. Great amp. I will always pick up Crown gear at cheap prices. Don’t know who bought my 300a but I have since had a D-150a or two, another DC-300a satin this time with IOCs and currently have a PSA-2 that work a treat. It has a fan and if in a solid cabinet (not top vented) uses the fan a good bit. Out in the open it just uses the low speed.
If you drive the heck out of the amp, put a fan on it unless it has the additional heat sinks very few of the amps got from the factory. The entire amp is the heat sink so don’t worry about the faceplate getting warm. It needs to be hot before the amp will thermally shut down.