Powerful 2000-watt monoblock amplifier (650-watt RMS) designed to power a subwoofer Easy Tune feature automatically adjusts audio settings for the best possible sound quality (requires setup using the Fusion-Link app on a compatible smartphone) Class-D amplifier design uses less power for longer listening with reduced battery drainage Includes mounting bracket for simple installation Important Note: Amplifier is designed exclusively for use with Fusion DSP-enabled stereos (Apollo RA770, Apollo RA670, Apollo WB670 and RA210) and Fusion speakers