MB Quart NA2-500.5 compact 400 watt mono Powersports amplifier to for a subwoofer - Newegg.com
Amazon.com: BOSS Audio Systems MCKGB350W.6 Weatherproof Marine Gauge Receiver and Speaker Package - IPX6 Receiver, 6.5 Inch Speakers, Bluetooth Audio, USB/MP3, AM/FM, NOAA Weather Band Tuner, no CD Player : Electronics