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Why are you still playing with these subs. Go get some power soft M-Force 40” subs and stop waisting time and money and have to have walls of speakers 4x bigger than a couple of these. There spl output is insane and they have completly reinvented the subwoofer by using a linear flat voice coil actuator and the amps for them are 15&20kv each with no chance of blowing them or burning out a voice coil. And they move massive amounts of air and can play sub sonic notes at spl and db unheard of in the current markets.
