Filter Filters Single 2 Ohm Remove All Filters Price $100-$500 (2) Condition New (2) Brand Harmony Audio (2) Size 12" (1) 15" (1) Sensitivity 87.dB (1) 88.2dB (1) Harmony Audio HA-RS12 Car Stereo Rhythm Loaded 12" Vented 600W Sub Box Enclosure $109.95 (1) Harmony Audio HA-RS15 Car Stereo Rhythm Loaded 15" Vented 900W Sub Box Enclosure $139.95 (1)