Simple. Effective. Dynamic. When the PSB engineering team set out to build a dynamic, cost-effective subwoofer, they established a new benchmark that has been hailed by audio critics. The SubSeries 6i uses a simple, but solid bass reflex enclosure to house a single 12-inch woofer backed by a powerful 350-watt amplifier. With crossover and gain controls, and both speaker and line level inputs, the SubSeries 6i integrates well with our other budget-minded speaker ensembles to deliver the excitement of home cinema.