Kicker 46CXA400.1T CX Series mono subwoofer amplifier — 400 watts RMS x 1 at 1 ohm at Crutchfield
Mb Quart Mbqrg-sub-1 Rugged 400 Watt Polaris Ranger Specific Plug And Play Subwoofer Tuned System With Subwoofer, Enclosure, And Amplifier, Black : Target
Amazon.com: KICKER 46CXA4001T CXA400.1 400 Watt RMS Mono Class D Car Audio Amplifier Amp : Electronics
Amazon.com: BOSS Audio Systems BE8AE Elite Series Car Audio Amplifier 8 Inch Subwoofer Package – 400 Watt Sub with Passive Radiator, Built-in Class D Monoblock Amplifier, for Truck Boxes and Enclosures Stereo :
PSB-400DSP Subwoofer Amplifier with DSP - 400W – Soundavo
Rockford Fosgate TM400X2ad Power Series 400 Watt (RMS) 2-Channel Marine Amplifier - Rock The Boat Audio