the chances are you could take a new sub and blast it right away with no problems, its still probably a good idea to break a sub in just to eliminate any risks but you should be fine after a coupple days

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-sony xplod CDX-F7715X head unit
-infinity kappa 4/6" plates
-soon to be infinity kappa 6/9"s
-2 infinity perfects 10.1
-infinity referance 7541A 4 channel amp
-infinity referance 1211A mono amp