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Replace fan QSC USA 1300

Im a little late to the conversation but I just picked up qsc USA 1300 to power home theater subwoofers and was wondering if you ended up figuring out the fan mod because the stock fan are quite loud.
Find the dimensions and current pull of the fan, then go on Digikey, put your metrics in, and choose the one with the lowest noise. Probably an Ebm-papst.
 
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