Invisible Subwoofer

The Stealth Acoustics Model B30G is a two-panel monaural subwoofer speaker system that becomes completely invisible after installation. Ideal for any surround sound, foreground music or whole-house audio system that needs extra bass output, each B30G panel incorporates two acoustically coupled, high-quality, high-power 8” (203 mm) cone woofers.  B30G panels may be mounted separately or stacked to achieve desired acoustical results.

Stealth Acoustics recommends the companion Model SA255 250-watt subwoofer amplifier/crossover as a matched amplifier for the B30G subwoofer speakers. Stealth Acoustics also offers a line of full-range speaker panels that when combined with the B30G, deliver a complete, totally invisible audio solution.

The B30G has a 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.  It may be installed in either the wall or ceiling and on-site finishing options include 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 may be supported using special techniques.

Recommended Uses

Premium Distributed Audio
Distributed Audio
High Performance & Cinema

Best for in-wall installations


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


Frequency Response:

20Hz to 160Hz

Power Capacity:

100 watts RMS

60 watts minimum
recommended power


86 dB (1 watt / 1 meter)

System Impedance:

8Ω nominal

Driver Components:


Four 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: 30″ (762 mm)

Mounting Depth:

2-1/2” (64 mm)

Product Weight:

20 lbs. (4.8 kg) each panel

Shipping Weight:

46 lbs. (21 kg) per pair

Included Accessories:

Mounting shims

Shim tape

Mounting screws

Terminal wrench

Optional Accessories:

PS-30 PlaceSaver

BX-30 MDF Acoustical Back Box

MBX-30 UL Listed Metal Back Box

MBA-30 UL Listed Adjustable Metal Back Box

MBC-30 Wood and Metal Back Box – For masonry applications

SK-1 Shim Kit

SA2400 2-Channel Amplifier

SA255 Monural Subwoofer Amplifier

Watch the installation video