The SW1 15" subwoofer incorporates dual subwoofer drivers in a compound push-pull (isobaric) configuration that generates true deep bass with high efficiency and ultra-low distortion. The compact SW1 provides powerful bass and can be used with any Induction Dynamics loudspeaker to add explosive impact to your surround sound system. Features dual 15" laminated cones with cast frames, rubber surrounds, and 120 oz magnets (compound push-pull configuration) with 700W power amplifier.