about 6 months back, I purchased a Peavey XR8600 powered mixer and (2) Peavey PV115 speakers to use strictly for vocals at my band's practices. This setup has worked great up until recently.

For the past few weeks, I turn on the mixer, adjust the volume, we start practicing, everything works great. At about 15 minutes into our practice, the PA goes completely silent. It remains powered on, and registering when we sing into the mic, but absolutely no audio. We've checked cable connections, settings, buttons, etc. Nothing has changed, the audio just drops. The only solution has been to turn it off for about 30 minutes, and then turn it back on, and it will proceed to do the same thing, work for 15 minutes, audio drops out.

It appears to be some sort of overheating issue... The PA is warm when the audio drops out, but not what I would think would be abnormally hot... If it is overheating, why? am I doing something wrong? We use no built-in effects, the volume is usually placed at about 1/3-1/2 up on both the channel and master knobs. We never have it loud enough to feedback. Could this be a simple malfunction/do I need to look into purchasing a new amp?

thanks in advance for your help.

I'm not familiar with this specific desk, but it might be worth checking the cooling fan. And opening it up and giving the insides a good clean if they're full of dust.

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