Filter Filters 12" Remove All Filters Price Under $50 (1) $50-$100 (9) $100-$500 (38) $500 and above (10) Condition New (52) Refurbished (6) Brand Harmony Audio (29) Kicker (21) Subwoofer Boxes (8) Voice Coils Dual (5) Single (3) Single 2 Ohm (2) Sensitivity 86-90 dB (1) 87 dB (1) 87.3 dB (1) 87.3dB (2) 87dB (1) 88.2dB (2) 88.6dB (2) Fixture Type Dual (24) Single (16) Receiver Size Yes 10-7-2015 (9) Harmony Audio HA-F124 Car Stereo Flatline Series 12" Sub 800W Single 4 Ohm... $99.95 Universal Car Stereo Hatchback Sealed Single 12" Kicker Comp C12 Sub Box... $189.99 Harmony Audio HA-A122 Car Stereo Alloy Series 12" Sub 1000W Dual 2 Ohm Subwoofer $84.95 Universal Car Stereo Rearfire Sealed Dual 12" Kicker Comp C12 Sub Box... $361.99 Universal Car Stereo Rearfire Sealed Single 12" Kicker Comp C12 Sub Box... $179.99 Universal Car Stereo Slotted S Port Single 12" Kicker Comp C12 Sub Box... $234.99 Universal Car Stereo Rearfire Sealed Dual 12" Kicker Comp C12 Sub Box... $479.95 Universal Car Stereo Rhino Coated Ported 12" Kicker Comp C12 Sub Box... $194.99 Harmony Audio HA-A122 Car Stereo Alloy Series 12" Sub 1000W Dual 2 Ohm... $164.99 Universal Car Stereo Slotted S Port Dual 12" Kicker Comp C12 Sub Box... $411.99 Universal Car Stereo Hatchback Sealed Dual 12" Kicker Comp C12 Sub Box... $381.99 Universal Car Stereo Paintable Ported 12" Kicker Comp C12 Sub Box Enclosure &... $215.99 Universal Car Stereo Vented Port Dual 12" Kicker CompR CWR12 Sub Box... $481.99 Universal Car Stereo Paintable Ported Dual 12" Kicker Comp C12 Sub Box... $420.99 Universal Car Stereo Paintable Ported Dual 12" Kicker CompR CWR12 Sub Box... $515.99 Harmony Audio HA-C124 Car Stereo Competition Carbon 12" Sub 2200W Dual 4 Ohm... $169.95 (4) Universal Car Stereo Rearfire Sealed Dual 12" Kicker CompR CWR12 Sub Box... $481.99 Harmony Audio HA-RS12 Car Stereo Rhythm Loaded 12" Vented 600W Sub Box Enclosure $109.95 (1) Universal Car Stereo Hatchback Sealed Dual 12" Kicker Comp C12 Sub Box... $494.95 Car Audio Single 12" Sealed Subwoofer Slanted Hatchback Stereo Sub Box Enclosure $54.95 Universal Car Stereo Hatchback Sealed Dual 12" Kicker CompVT CVT12 Sub Box... $491.99 Universal Car Stereo Hatchback Sealed Dual 12" Kicker CompR CWR12 Sub Box... $509.99 Harmony Audio HA-R124 Car Stereo Rhythm Series 12" Sub 600W Single 4 Ohm... $67.95 (2) Car Audio Dual 12" SPL Bass Subwoofer Labyrinth Vent Sub Box Stereo Enclosure $129.95 (1) 123