Kicker's KXM400.4 4-channel amplifier can supply 4 speakers with up to 50 watts RMS each, so you'll hear all the beauty and brilliance of your favorite songs over the roar of the wind and water. This reliable and compact amp remains cool even when pushed hard, thanks to its high-mass heatsink, high-tech internal components, and efficient full-range Class-D amp technology.The KXM400.4 features a conformal coated circuit board for improved water and dust resistance, plus corrosion-resistant power connections, a gasket-sealed front cover, and stainless steel mounting hardware that won't rust all over your boat's gel coat or carpeting. The all-weather protection even extends to the UV-protected heat sink finish.

General Features:

• 4-channel marine amplifier
• Class D amp technology 
• Fail-Safe Integration Technology eliminates stray noise 
• Conformal coated circuit boards 
• Corrosion-resistant power terminals
• Gasket-sealed front cover
• Stainless steel mounting hardware 
• Blue light-pipe illumination matches Kicker's marine speakers
• Sealed potentiometers 
• UV-resistant heat sink finish
• 11-3/16"W x 2-1/8"H x 8-5/16"D
• 50 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
• 200 watts RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode)
• Variable bass boost (0-18 dB at 40 Hz)