Invisible Subwoofer

The Stealth Acoustics model B22G is a compact, two-panel monaural subwoofer speaker system that becomes completely invisible after installation. The subwoofer has a heavy duty rigid frame that attaches directly to standard structural framing. The paintable active diaphragm face is bonded to the frame of the speaker panel, creating an active area surrounded by a stable mounting area.  Each panel incorporates an acoustically coupled, high-quality, high-power 8” (203 mm) cone woofer.

Stealth Acoustics recommends the companion Model SA255 250-watt subwoofer amplifier/crossover as a matched amplifier for the B22G subwoofer speakers. Stealth Acoustics also offers a line of full-range speaker panels that when combined with the B22G, deliver a complete, totally invisible audio solution.

The B22G may be installed in either the wall or ceiling.  It can be finished on site with latex paint, light wallpaper, fabrics and selected texture coats. There is no need for special vellums or other nonstandard wallboard finishing materials. Advanced finishing methods such as Venetian plaster and select veneers are supported using special techniques.

Recommended Uses

Background Distributed Audio, designed for use with the LR6g for extra impact in critical listening zones.

Best for in-wall or in-ceiling installations.


LineaResponse Brochure: Download PDF
Specification Sheet: Download PDF
Installation Instructions: Download PDFView Instructions
Dimensional Drawings: Download PDF
Test Results: Download PDF


Frequency Response:

30Hz to 150Hz

Power Capacity:

80 watts RMS

50 watts minimum
recommended power


86 dB (1 watt / 1 meter)

System Impedance:

8Ω nominal

Driver Components:


Two 1-1/2” (38 mm) voice coil, 8” (203 mm) woofers

Ceramic 20 oz. (567 gr) magnet

Polar Dispersion:

170 degrees vertical and horizontal


Width: 15-7/8” (403 mm)

Height: 22″ (559 mm)

Mounting Depth:

2-1/2” (58 mm)

Product Weight:

10.5 lbs. (4.8 kg) each

Shipping Weight:

30 lbs. (3.6 kg) per pair

Included Accessories:

Mounting shims

Shim tape

Mounting screws

Terminal wrench

Optional Accessories:

PS-22 PlaceSaver

BX-22 MDF Acoustical Back Box

MBX-22 UL Listed Metal Back Box

MBA-22 UL Listed Adjustable Metal Back Box

MBC-22 Wood and Metal Back Box – For masonry applications

SK-1 Shim Kit

SA2400 2-Channel Amplifier

SA255 Monural Subwoofer Amplifier

Watch the installation video