Hi, Are you losing the same channel every time? How loud were the amps playing at failure, and what was the nature of the failure e.g. Smoke? Bang? suddenly went quiet? Could be a number of things: Intermittent short in speaker cable or inside the speaker itself (check to be sure binding posts are tight, and no loose or stray wires at connecting points on both amp and speaker end), pre-amp may be putting some dc voltage into the power-amp (could be from the pre-amp or the cd player -you should be able to check this with a digital voltmeter -even a cheap meter). Could also be an arced voice-coil or crossover component. More info would help narrow it down.
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