The PQUARTZ-R is a very high output Minima One™ self-powered concert Infra™ subwoofer system designed to minimize the space required to obtain extremely high level and high fidelity low frequency output. It provides perfectly flat response below 20 Hz when used in conjunction with the Infra™ Integrator. The PQUARTZ-R includes casters, handles, feet and pole mount adapters for support of upper range speakers. Our external rack mount Infra-MXB Integrator may be used to drive a line level infra processed signal to one or more PQUARTZ-R systems.