Virtually Invisible Speaker System Design: The Virtually Invisible speaker system design gives you expansive sound without dominating your décor. The Acoustimass module delivers deep, powerful bass without audible port noise, so it can be hidden almost anywhere in the listening area. The music and sound effects seem to come from the tiny cube speakers.

Next-generation Powered Acoustimass Module: The newly engineered Acoustimass module uses a proprietary acoustic enclosure and patented technologies to produce deeper, richer and louder bass than the previous generation.

Integrated Signal Processing: The Bose patented integrated signal processing compensates for the human ear's reduced sensitivity to bass at low volumes. You hear the proper balance of deep bass, even at very low, late-night listening levels and dialogue continues to sound natural.

Automatic System Protection Circuitry: When played at high volume, this system's automatic protection circuitry activates to prevent damage to the system from electrical stress or overload. When this happens, you may notice a slight decrease in volume, which is normal.

Drivers: The powered Acoustimass module uses a single 5-1/4" high-excursion paper cone woofer with a foam surround. 

Left Side of Acoustimass Module:

LFE: the LFE level control increases or decreases the relative level of low-frequency effects on movie soundtracks

Bass: allows you to increase or decrease the bass level of the Acoustimass module

Bottom of Acoustimass Module:

Audio Input: 15-pin male jack for use with supplied system input cable. The other end of the system input cable has tinned wire that connects to the left front, right front, center, left rear and right rear speaker outputs and a male mono RCA plug that connects to the subwoofer output of the A/V receiver or amplifier.

Audio Output: 5 RCA jacks (Left Front, Right Front, Center Front, Left Rear and Right Rear); using the supplied speaker cables, these jacks connect to the cube speakers

Power: jack for use with supplied AC power cord

Connectivity: compatible with A/V receivers and amplifiers rated from 10 to 150 watts per channel, rated from 4 to 8 ohms

Powered Acoustimass Module: W=8.234", H=16.3125", D=22.375"