Contemporary Research SMG-40
SMG-40 Sound Masking Generator and Amp
Description
The Contemporary Research SMG-40 addresses this issue by combining a sound masking generator with a 40W RMS Class D amplifier in a single compact enclosure. This provides a genuinely economical way to deliver speech privacy without specifying a full distributed masking system with separate processing and amplification.
Tunable pink noise, music input and remote mute
At the heart of the unit is filtered pink noise specifically shaped for masking speech in real-world spaces, rather than the flat noise that tends to sound like an air handler and irritate occupants.
Front-panel controls allow the installer independent adjustment of masking level, bass and treble, so the spectrum can be tuned to the room's acoustics. The ceiling construction is on site rather than guessed during the design stage.
A separate 3.5mm stereo music input with its own level control lets the same unit carry background music alongside the masking signal, and a contact closure input provides remote mute for paging or life-safety integration.
Output flexibility is where the SMG-40 earns its place. The 40W Class D amplifier will drive over 30 25V plenum and ceiling speakers, 70V transformer-equipped speakers, or 4/8 ohm loads through a 3-pin Phoenix terminal and two RJ-45 Cat5 outputs support over 100 Cambridge Qt Emitters. Thus meaning the unit can serve either a traditional distributed speaker approach or a direct-field emitter system. Class D operation keeps power consumption and heat generation low enough so that the unit can live in a ceiling void or a sealed cabinet without ventilation concerns.
Speaker and emitter compatibility
The aluminum enclosure with black powder coat measures just 5.5" W × 2.375" H × 3.875" D and weighs one pound, with surface-mounting flanges included.
Power comes from an included 24VDC, 2.5A supply. The unit is made in the USA and Conference Room AV is an authorized Contemporary Research dealer offering free shipping with 30-day returns.
This is a compact, well-speced answer for anyone who needs speech privacy without a system-scale budget. When a room needs mic mixing and program amplification rather than masking, the Contemporary Research 232-AMP+W mixer/amplifier is the sister product; for full-scale distributed audio, see the Bose PowerShareX PSX4804D.
