Best Buy: Kenwood 400W Bridgeable 4-Channel Amplifier w/Variable Crossovers KAC-6402
KENWOOD KAC-M1824BT Maxpower Series 400-Watt-Max 4-Channel Compact Marine/Powersports/Automotive Class D Amplifier with Bluetooth And Remote - Walmart.com
Kenwood KAC-M3004 Compact 4 Channel 400W Max Power Amplifier
Amazon.com: Kenwood KAC-M1814 4-Channel Compact Bridgeable Marine/Motorsports 400W Max Power Digital Amplifier : Electronics
Kenwood KAC-M1824BT Compact 4-channel amplifier with Bluetooth® connectivity — 45 watts RMS x 4 at Crutchfield
Kenwood KAC-M3004 Compact 4 Channel 400W Max Power Amplifier
Amazon.com: Kenwood KAC-M1814 4-Channel Compact Bridgeable Marine/Motorsports 400W Max Power Digital Amplifier : Electronics