Heinrich's SMS6/T is an elegant wall/surface-mounted loudspeaker. The ABS housing is equipped with a transformer with dual voltage (100V/70V) and 5-inch cone loudspeakers with wider coverage angles. With a curved ABS housing, 5" cone loudspeakers exhibit wider coverage angles.

The SMS Series offers the first serious alternative to wooden wall baffles and can be used in classrooms, malls, atriums, church fellowship halls, meeting rooms, and other venues where recessed speaker systems are not practical. SMS cabinets mount easily with hole cover caps and customer-supplied hardware. In the vertical orientation mounting the keyhole bracket is used. Horizontal attachment is made using the two front mounting holes. For audio connection, mount over electrical box or by allowing cable entry through either of two provided cutouts.

The SMS6/T uses 5" driver with a power rating of 6 watts. In addition to UV inhibitors and optional volume controls, the white ABS molded cabinets also include bass ports, mounting hole covers, transformer tap selection via spade lugs, and terminal blocks for connecting. It can be supplied as BS5839 part 8 voice alarm compliant, which means a ceramic terminal and thermal fuse must be installed.