QM 212S is a multi-chamber band-pass design with the additional hybrid direct radiating pressure chamber loading of its two purpose designed 12" bass drivers. High-tech woofer designs and the high efficiency, twin chamber acoustic design, the compact QM212S delivers the tight punchy bass ideal for medium sized venues. The QM 212S is designed using the in twin asymmetrical acoustic chambers that deliver very high speaker loading and output from a relatively small cabinet profile. It is ideal for use in live applications that require reproduction of low frequencies with very high transient content at high output levels.