Filter Filters 1 Remove All Filters Price $100-$500 (3) Condition New (3) Brand Harmony Audio (3) Amplifier Class Class D (3) Stable to (Ohm) 1 Ohm (3) Harmony Audio HA-A1500.1 Car Stereo Class D Amp Mono 3000 Watt Subwoofer... $239.95 (9) Harmony Audio HA-A800.1 Car Stereo Class D Amp Mono 1600 Watt Subwoofer... $149.95 (3) Harmony Audio HA-A400.1 Car Stereo Class D Amp Mono 800 Watt Subwoofer... $104.95 (6)