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I bought a 300 watt amp and 10in type s sub. i wired up the sub bridged on Chanel 3 and 4 like the directions told me and had a cross over foe the duel voice coil. it was fine for about a month then it started to bottom out when cranked up then it got to the point the if i tried to crank it up no sound would come out of the whole system. so for some reason i unplugged the crossover on the sub and it worked fine but still bottomed out when up high but didn't cut out. what could be wrong. thanks

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You are reaching the physical limit of the drivers' range of excursion. It is also likely that at least one of the voice coils has thermal protection and when you disconnected the crossover you also disabled that protection...thus no "cut out."
As for "bottoming out" you could either reduce the volume, or modify the subwoofer enclosure so it will reduce the amount of the cone movement.

Posted on Jun 18, 2009

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