Radial Engineering SB5W
Wall Mount Direct Box


The Radial Engineering SB5W is a stereo direct box that fits inside a standard light switch electrical enclosure and employs a Decora wall plate cover for the fit and finish. As the design is completely passive, no local powering is needed. Choice of RCA or 3.5mm mini TRS inputs make it easy to interface to laptops and iPhones. A simple level control sets the output. This is augmented with a set & forget switch to sum the stereo audio file to mono plus a ground lift to eliminate hum and buzz caused by ground loops that often appear when interfacing computers and video projectors with professional audio equipment. Connections from the SB5W are done with simple screw-down terminals and tie wraps for strain relief. Made in Canada from 16 gauge steel, the electronics are fully enclosed in a metal casing to reduce susceptibility from outside magnetic interference.

Add to Cart

We're sorry, only of this item available

Call a Sales Pro at for more information

Serving Contractors, Dealers, and Installers Since 1977

Contact: 1-800-828-0509 / Hours: Mon - Fri 7:00AM - 7:00PM