Okay, I recently bought a single 10 inch MA Audio Dual 4 ohm voice coil subwoofer. 500 watts RMS and 1000 watts MAX. I already had a bazooka CSA300.1 500 watt max amp. Using this amp I was pushing the sub at 375 watts at 2 ohms with the coils wired in series in a .64 cu ft sealed box. Here is the stumper... I don't know where to set the crossover on the amp... I get hardly any really low bass yet up around 100 hz I would guess, the whole car is shaking. Does this sound like I have something set wrong or is this just because the amp is WAYYY underpowered for the woofer? This amps max can't hardly even touch the RMS of the sub...

 

first off did you take an actual RMS reading ????
Second is .64 cu ft the proper box vol for that sub
third if you want real low nut shaking bass go bigger sub

 

do not underpower that sub. Ma Audio subs are pertty picky when it comes to the power requirments