Kicker 47KMWPY420 Marine-grade yellow ground wire, 20-feet (4-gauge) Motorcycle Audio (1) TM400X4ad Amplifier

(1) TM400X4ad Amplifier

and 100 Hz Selectable 12dB/Oct HP Butterworth Crossover

Digital Selective Calling: Class D

5 NMEA 2000 T-connectors

1/2" Self-tapping screw

Kicker 47KMWPY420 Marine-grade yellow ground wire, 20-feet (4-gauge) Motorcycle Audio (1) TM400X4ad AmplifierSerious ground cable for your boat Boat owners: your boat's electrical system supplies serious current to your amplifier, so it needs to deliver its power effectively, as well as withstand the harsh marine environment. Kicker's power and ground wire meets Coast Guard and ABYC standards for marine use. Kicker uses standard marine color coding red for power, yellow for ground. Oxygen free copper Kicker uses pure oxygen free copper and tins it in nickel