Harmony (2) HA-ML121 Monolith 12" Competition Sub 3000W Subwoofer & HA-A1500.1 Harmony Audio (2) HA-ML121 Monolith 12" Competition Sub 3000W Subwoofer Bundle with HA-A1500.1 Amplifier & Amp Kit. 2 x Harmony Audio HA-ML122 Monolith 12" Competition Sub 3000W Dual 2 Ohm Subwoofer.
eBay