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Pyle 4 Channel Marine Amplifier - Compact Power 400 Watt RMS 4 OHM Full Range Stereo & Waterproof - Wireless Bluetooth Receiver Audio Speaker with LCD Digital Screen - PFMRA440BB
Amazon.com: 2 X 400Watt Class D Audio Amplifier Board Compact - T-AMP : Electronics
New BOSS Audio R1004 400 Watt 4 Channel Car Power Amplifier Mosfet+8 Ga Amp Kit
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Amazon.com: MUSYSIC SYS-2000 High Power Amplifier – Dual Channel 2000 Watts Peak Output for Distortion Free and Clear sound 2U Chassis Professional Power Amplifier with ATR Technology XLR 1/4Inch Input for Speakers :
Pyle Hydra Marine Amplifier - Upgraded Elite Series 400 Watt 2 Channel Micro Amplifier - Waterproof, GAIN Level Controls, RCA Stereo Input, 3.5mm Jack & Volume Control (PLMRMP1A)