The WMM630 is a speaker back box made of medium-density fiberboard (MDF) that allows for the installation of a wide variety of in-ceiling or in-wall speakers. It provides an ideal environment for installed speakers while reducing sound radiation to adjacent rooms. The 345 x 545 x 150 mm dimensions allow it to be placed between a wide variety of wall studs or ceiling beams.

It has an internal volume of 21 liters and comes with a pre-cut speaker cutout with a diameter of 150 mm and pre-scored circular cutouts up to 250 mm. The corners feature L-brackets for easy mounting to any type of stud or beam, and it comes pre-installed with sound-dampening material for optimal acoustic performance.