Gravity Audio GBR300.4DM True 600-Watt RMS Micro Ultra Compact Digital 4-Channel Full Range Amplifier with RCA Stereo Input - IPX65 Waterproof - Perfect for Motorcycle, RV, ATV, Car, Boat, Marine

Gravity GBR300.4DM True 600-Watt RMS Micro Ultra Compact Digital 4-Channel Full Range Amplifier with RCA Stereo Input - IPX65 Waterproof - Perfect for Motorcycle, RV, ATV, Car, Boat, Marine

DteeDck RCA Splitter 1 Female to 2 Male, 2 Pack - RCA Audio Video Cable Splitter Adapter, Dark Blue

DS18 BTTWO Bluetooth Receiver - IP65 Waterproof Rated, BT 4.0, Remote Trigger Output, Stero Male RCA Output - Allows Connect & Play Integration to Your Audio Device