The subwoofers have a great reputation for their reliability and extended low frequency response. They provide massive output yet are extremely musical, due in large part to rigid enclosures and advanced transducer designs. The M series models use powerful, custom manufactured drivers. Integral pole available to support one mid-high or full range loudspeaker. Partner with the Quest QA1004 amplifier (switch-able electronic x-over) for a great sub bass solution for small venues that want real bass.