About External or Remote Bass Controls | MTX Audio - Serious About Sound®
JL Audio RBC-1 Remote bass control for JL Audio amps at Crutchfield
Kenwood XR601-1 Reference Fit Mono Power Amplifier with 600W x 1 output at 2 ohms, 1200W maximum power, Bass Knob Included, Speaker Level Inputs and Signal Sensing Turn On - Creative Audio
KENWOOD KSC-SW11 ACTIVE UNDERSEAT SUBWOOFER AMP BUILT-IN 150 WATTS BASS CONTROL 19048202215 | eBay