Low-frequency loudspeaker featuring one 5.25″ (133mm) woofer that delivers deep, non-localized bass down to 40 Hz without audible distortion. For surface-mount applications

Acoustimass speaker technology filters out audible distortion to deliver non-localized bass

Designed to work with the FreeSpace 3 surface and flush satellite speakers, or existing systems where additional bass reinforcement is desired

Module design allows parallel connection of multiple bass modules and can accommodate two or four FreeSpace 3 satellites per bass module

Selectable 70/100V or low impedance

Architects’ and Engineers’ Specifications

The loudspeaker system shall be a 200 watt ported loudspeaker system that includes one Acoustimass® module and two or four satellite speakers. It shall be capable of producing 93 dB SPL average in a 45,000 ft3 room with an RT60 of 1 second in a range of 50 Hz to 16 kHz (±3 dB).

The module shall have one 5.25″ (133 mm) dual voice coil low frequency driver. The module shall have an input impedance of 6 ohms (5 ohms for surface-mount module) for direct connection to un-equalized low impedance amplifier sources. The system shall be configured for use with either a 70/100 V input or a low impedance input. The transformer shall offer multiple taps of 25 W, 50 W, 100 W, and 200 W.

Each satellite speaker shall have one 2.5″ (64 mm) full-range driver. The nominal average dispersion shall be 170° at –6 dB.

The input connectors shall consist of multi-position screw-type barriers on the flush-mount Acoustimass module, a spring-type barrier connector for the 70/100 V inputs and a screw-type barrier strip for direct 4-8 ohm input on the surface-mount Acoustimass module, a two position guillotine connector on the flush-mount satellite, and a two position screw-type barrier on the surfacemount satellite. Wire jumpers for transformer settings shall be provided. Removable covers shall shield all bass module input and jumper connections.

The flush-mount Acoustimass module shall have dimensions of 15.4″ (391 mm) outer flange diameter; 14.25″ (361 mm) ceiling hole diameter; and 7.5″ (190 mm) height to top of housing. It shall weigh 14 lb (6.36 kg). The surface-mount Acoustimass module shall have dimensions of 14.0″ H x 8.7″ W (w/bracket) x 13.6″ D (356 mm x 221 mm x 345 mm) and shall weigh 17.5 lb (7.9 kg) with attached mounting bracket. Each flush-mount satellite speaker shall measure 6.2″ (157 mm) outer flange diameter; 5.0″ (127 mm) ceiling hole diameter; and 5.0″ (127 mm) to top of housing. It shall weigh 1.9 lb (0.9 kg). Each surface-mount satellite speaker shall measure 3.0″ H x 3.0″ W x 4.0″ D (77 mm x 77 mm x 102 mm) and shall weigh 1.75 lb (0.8 kg).

The flush-mount Acoustimass module and flush-mount satellite enclosures shall be composed of PC/ABS with an expanded metal grille and shall meet plenum ratings when used with a plenum cover. The surface-mount Acoustimass enclosure shall be composed of high-density wood composite with solid color PVC laminate, black or white. The surface-mount satellite shall have a cloth grille and black or white polymer finish.

The loudspeaker shall be the Bose® FreeSpace® 3 loudspeaker system.