Filter Filters 83.1dB Remove All Filters Price $100-$500 (2) Condition New (2) Brand Harmony Audio (2) Size 12" (2) Voice Coils Dual (2) Harmony Audio HA-ML121 Monolith 12" Competition Sub 3000W Dual 1 Ohm Subwoofer $309.95 (1) Harmony Audio HA-ML122 Monolith 12" Competition Sub 3000W Dual 2 Ohm Subwoofer $309.95 (9)