Alpine S-A60M S-Series mono subwoofer amplifier * 600 watts RMS x 1 at 2 ohms - Breakers Stereo and Performance
Amazon.com: Alpine S-A60M 600 Watt RMS Mono Car Audio Amplifier Subwoofer Amp Class-D Bundle with Rockville Rock Everywhere Portable Bluetooth Speaker/Waterproof/Wireless Link : Electronics
Pyle 6-Channel Audio Marine Amplifier - Compact Power 600 Watt RMS 4 OHM Full Range Stereo with Volume Bass Treble Rotary Control - Wireless Bluetooth Receiver Speaker & LCD Digital Screen PFMRA640BB : Electronics - Amazon.com
Amazon.com: Pyle 6-Channel Audio Marine Amplifier - Compact Power 600 Watt RMS 4 OHM Full Range Stereo with Volume Bass Treble Rotary Control - Wireless Bluetooth Receiver Speaker & LCD Digital Screen PFMRA640BB : Electronics