"The DS18 NXL 4-Channel Full-Range Class-D IP67 Flush-Mount Amplifier is the epitome of sleek design and powerful performance, specifically crafted to enhance your marine audio experience. Created to complement the DS18 NXL-series speakers (not included), this marine amplifier delivers exceptional loudness and efficiency for your marine audio system. Equipped with 4 channels, it provides versatility by accommodating virtually any speaker within its power recommendations. The NXL boasts an impressive power output of 160W x 4CH at 2ohms and 100W x 4CH at 4 ohms. This kind of power is sure to drive your speakers to their full potential. A built-in voltmeter lets you monitor your battery's voltage levels directly from the amplifier itself. This allows you to keep track of your power supply. Its compact dimensions (11.5""L x 7.5""W x 4.25""D) and flush-mount configuration make it easy to install in tight spaces. Mfrs. 2-year warranty. Manufacturer model #: NXL-F4. Marine protection and full range sound 4-channel amplifier 4 x 100W @ 4ohm Built-in voltmeter Class-D IP67 water resistance rating Flush mount"