PS18E-I is a self-powered single 18” bass system designed for permanent installation. The PS18E-I 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 one or more PS18E-I systems. The PS18E-I offers a black textured finish and a black coated steel grille.