The S12E-R is an Infra™ subwoofer system designed to provide high fidelity extended low frequency audio reproduction from a relatively small enclosure. The S12E-R provides perfectly flat response down to 8 hertz when used in conjunction with the 8 hertz Integrator. Our external rack mount Infra-MXB Integrator is recommended to drive a line level Infra™ processed signal to the amplifiers driving one or more S12E-R systems. Designed for portable use, the S12E-R includes handles, durable grille and a pole mount adapter on a black Ro Tex™ finished enclosure.