Polk Audio PA880 High Performance Monoblock Mobile Audio Amplifier Mono-block amplifier for subwoofer use 300 Watts x 1 (4 ohm), 500 Watts x 1 (2 ohm) CEA-2006 compliant specifications for true, accurate power ratings 800 Watts x 1 (2 ohm) dynamic power 2 ohm stable design can drive even the most demanding subwoofers