VMInnovations via eBay offers two Planet Audio 12" 1,800-watt Subwoofers bundled with the Q-Power 12" Dual Vented Subwoofer Box Enclosure, the Planet Audio Mono Car Amplifier, and the Soundstorm 8-Gauge Amplifier Installation Kit for $219.99 with free shipping. That's $37 under the lowest price we could find for these items purchased separately elsewhere. The subwoofers feature 900-watt RMS each.