DS18 NXL-M4 Full Range 4 Channel IPX5 Marine Grade Amplifier - 150 x 4W @ 4-Ohm [NXL-M4]NXL M4 Full Range 4 Channel IPX5 Marine Grade Amplifier 150 x 4W @ 4 Ohm Designed for intense sessions that keep the party boat rocking all night long; the NXL M4 is DS18s high quality, powerful amplifier for the wave runner looking for a big sound with a small footprint! As a Class D Digital amplifier, the NXL M4 uses a direct insert speaker and power terminals significantly smaller than your average amplifier, making it the perfect size for any