15" Harmony Audio HA-C152 Car Stereo Competition Carbon 15" Sub 2800W Dual 2 Ohm... $189.95 (1) Harmony Audio HA-R154 Car Stereo Rhythm Series 15" Sub 900W Single 4 Ohm... $84.95 Harmony Audio HA-A152 Car Stereo Alloy Series 15" Sub 1500W Dual 2 Ohm Subwoofer $109.95 Harmony Audio HA-ML152 Monolith 15" Competition Sub 3200W Dual 2 Ohm Subwoofer $339.95 (6) Harmony Audio HA-C154 Car Stereo Competition Carbon 15" Sub 2800W Dual 4 Ohm... $189.95 (1) Harmony Audio HA-ML151 Monolith 15" Competition Sub 3200W Dual 1 Ohm Subwoofer $339.95 2x Harmony Audio HA-C152 Car Competition 15" Sub 2800W Dual 2 Ohm Subwoofer New $359.99 2x Harmony Audio HA-C154 Car Competition 15" Sub 2800W Dual 4 Ohm Subwoofer New $359.99 2x Harmony HA-ML152 Monolith 15" Competition SPL Sub 3200W Dual 2 Ohm Subwoofer $649.99 Harmony HA-ML1X15D2 15" Dual 2-OHM Subwoofer Vented Enclosure Box Subpackage $409.95 2x Harmony HA-ML151 Monolith 15" Competition SPL Sub 3200W Dual 1 Ohm Subwoofer $649.99 4x Harmony Audio HA-C154 Car Competition 15" Sub 2800W Dual 4 Ohm Subwoofer New $740.99 Harmony Audio HA-A152 Car Stereo Alloy Series 15" Sub 1500W Dual 2 Ohm... $209.99 4x Harmony Audio HA-C152 Car Competition 15" Sub 2800W Dual 2 Ohm Subwoofer New $740.99 4x Harmony HA-ML152 Monolith 15" Competition SPL Sub 3200W Dual 2 Ohm Subwoofer $1300.99 8x Harmony Audio HA-C152 Car Competition 15" Sub 2800W Dual 2 Ohm Subwoofer New $1430.99 8x Harmony Audio HA-C154 Car Competition 15" Sub 2800W Dual 4 Ohm Subwoofer New $1430.99 4x Harmony HA-ML151 Monolith 15" Competition SPL Sub 3200W Dual 1 Ohm Subwoofer $1300.99