Blue Octave RW8 In Wall 8" Passive Subwoofer Speaker Home Theater Sub Blue Octave RW8 Resonance Series in wall passive 8" subwoofer speaker, recommended power is 10-200 watts, efficiency is 93dB, frequency response is 35Hz-200Hz, 8ohm 8" aerated blue IMPP cone woofer, butyl rubber surround for longer life, spring loaded raw wire connections, low profile housing designed for easy installation Paint-able frame and grill, unique wall locking mounting system, no mounting hardware needed, cut out size is 9.72" x 9.72", overall size is 10.98" x 10.98", mounting depth is 3.75" Cut-out template and full instructions included, designed and engineered in the USA, this passive sub requires the B1000S sub amplifier or a sub amp with similar specifications Use for home theater, surround systems, whole house, multi-room audio systems, covered outdoor areas, commercial, office, retail applications, package contents is 1 passive in wall sub speaker