Sound Storm Laboratories US8 8 Inch Under Seat Powered Car Audio Subwoofer - 800 Watts Max, Low Profile, Built in Amplifier, for Truck, Boxes and Enclosures, Remote Subwoofer Control

Sound Storm Laboratories SX310 Car Audio Electronic Crossover - 2/3 Way Pre-amp, with Remote Subwoofer Level Control, Use with Amplifier Stereo Equalizer, Line Output Converter

Sound Storm Laboratories LOPRO8 Powered Under Seat Car Subwoofer - 600 Watts Max, Single 2.6 Ohm, Voice Coil, Built in Amp, Low Profile, Remote Subwoofer Control

Sound Storm Laboratories PB8 Car Subwoofer and Amp Package – Built-in Amplifier, 8 Inch Subwoofer with Passive Radiator, Remote Subwoofer Control

Sound Storm Laboratories CG1202 Charge Series 2 Channel Car Audio Amplifier - 1200 High Output, 2-8 Ohms, High/Low Level Inputs, High/Low Pass Crossover, Bridgeable, Hook Up to Subwoofer for Bass