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Kenwood KAC-M1814 4-Channel Compact Bridgeable Marine/Motorsports 400W Max Power Digital Amplifier
Amazon.com: Taramps TS400X4 Full Range 2 Ohm 4 Channel 400W Class D Car Audio Amplifier : Electronics
Amazon.com: Rockford Fosgate Punch PBR400X4D Compact Chassis 400-Watt Full-Range 4-Channel Amplifier : Electronics
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Amazon.com: Taramps TS400X4 Full Range 2 Ohm 4 Channel 400W Class D Car Audio Amplifier : Electronics
