Kicker 47KMDB3 ABYC Compliant Ground Distribution Block

Well Grounded You need the best possible connection from your amplifiers to ground. That's why KICKER didn't re-purpose a car-stereo solution to a marine environment. They created a simple, ABYC-compliant ground block made specifically for your boat. Use the RT-Series ring terminals for the best possible connection.
Accepts three ground wires
Compliant to Coast Guard and ABYC standards