The SB8 subwoofer delivers incredible output from an ultra compact package. This remarkably tight and musical sub uses a special high-performance 8" Super Fast Deep Bass" long-throw driver. The sealed Deep Bass enclosure design delivers enhanced low frequency extension, especially for a cabinet this size, with useful output down to 30Hz. A two-position phase switch ensures easy integration of the subwoofer and M7/M5/M4 satellites in any room. Speaker level and line level connections are included for maximum set-up flexibility. An automatic On/Standby switching circuit activates the amplifier when a signal is detected and turns it off after a period with no signal.