Filter Filters 15" New Remove All Filters Price $50-$100 (1) $100-$500 (4) $500 and above (2) Brand Harmony Audio (5) Subwoofer Boxes (2) Voice Coils Dual (1) Sensitivity 89.4 dB (1) Receiver Size Yes 10-7-2015 (2) Car Audio Dual 15" SPL Bass Subwoofer Labyrinth Vent Sub Box Stereo Enclosure $179.95 Car Audio Single 15" SPL Bass Subwoofer Labyrinth Vent Sub Box Stereo Enclosure $99.95 (1) Harmony Audio HA-RS15 15" Vented 900W Loaded Enclosure with Harmony Audio... $190.99 Harmony Audio HA-A152 Car Stereo Alloy Series 15" Sub 1500W Dual 2 Ohm... $209.99 8x Harmony Audio HA-C152 Car Competition 15" Sub 2800W Dual 2 Ohm Subwoofer New $1430.99 4x Harmony HA-ML151 Monolith 15" Competition SPL Sub 3200W Dual 1 Ohm Subwoofer $1300.99