MBX Metal Back Box



Metal Back Box

MBX back boxes can be used in walls or ceilings where a UL rated metal enclosure is required behind the speaker or to reduce sound transfer to adjacent spaces.  At 3-1/2” (89 mm) deep, the MBX series of back boxes will fit into standard 2×4 stud bays or larger apertures and are designed to fit in between 16” (406 mm) on-center studs.

MBX metal back boxes are constructed of 1.1 mm thick metal, are UL listed, and shipped fully assembled.  Convenient knockouts for conduit are provided, 2 each on the top and bottom of the box.  The knockouts will accept either 1/2” (13 mm) or 3/4” (19 mm) conduits and loom clamps.



Screw package(Included)
3/4” (19 mm) x 1-1/2” (38 mm) metal mounting angles.



LineaResponse Brochure: Download PDF

Specification Sheet: Download PDF


Model For Speakers Width Height Depth Ship Weight
MBX-30 LR3gB30g 14-1/2″(368 mm) 28-1/2″(722 mm) 3-1/2”(89 mm) 13 lbs.(5.9 kg)
MBX-22 LRX83LR8gB22gSLR8gLR4G-LF 14-1/2″(368 mm) 20-1/2”(519 mm) 3-1/2”(89 mm) 10 lbs.(4.5 kg)
MBX-12 LR6GLR4G-HM 14-1/2″(368 mm) 10-3/8″(262 mm) 3-1/2″(89 mm) 8 lbs.(3.6 kg)



MBX Back Box installation diagram