Anonymous posted an answer for this Alpine SWR-1222D 12" Type-R Series Subwoofer Car Speaker:
"It could either be a mechanical problem with the subwoofer or it could be a power issue..."
Anonymous posted an answer for this Alpine PDX-1.1000 1000W x 1 Car Amplifier Car Audio Amplifier:
"straight up. Since it has the power saving technology where it gives out the same power at..."