SM12SUB70-WSurface Mount 12" Subwoofer System in White Color made by Atlas Sound is designed for 8 and 70.7V distributed audio applications where low-frequency enhancement is desired. This model features a unique compact cabinet design with multiple "-20 inserts to allow easy suspension or wall mounting. It includes a built-in 18dB / octave three-pole passive crossover network coupled to a long-excursion 12" woofer housed in a multi-angle wood enclosure system. The passive crossover eliminates the need for a separate crossover or dedicated amplifier to power the speaker. A premium 70.7V transformer allows the SM12SUB70 to be paralleled with any 70.7V commercial audio system to provide extended low-frequency response and more overall audio impact for foreground music systems. (Unit is also 8 compatible).