Sound and noise control
  Your One-Stop Resource for Soundproofing and Noise Control Solutions
Applications What’s Your Problem? Acoustics 101 Soundproofing Tips Literature Photos News
Who We Are International Sales Contact Us Links Site Map Blog Home
dBA Panels


Stay Connected


National Save Energy Coalition

Specifications subject to change with out notice.

© Acoustical Surfaces, Inc. – All Rights Reserved.
Compact Sound Masking System


Structure Sound Masking Loudspeaker

The SMS-STR is a 25-volt system loudspeaker designed to generate the optimum masking sound for a variety of ceiling conditions. It is equpped with a 5″ (13 cm) driver installed in a sealed enclosure.

The design is ideal in open structure ceiling configurations since the speaker, terminal and switch will be hidden when the speaker is hung from the deck. It can also be installed above suspended ceilings in typical sound masking installations. A rotary switch allows quick adjustment of the output level with 4W, 2W, 1W, ½W, ¼W power available at 25V. The loudspeaker is also compatible with 70V systems with 8W, 4W, and 2W, adjustment available.


  • Power: 10 watts
  • Line Voltage: 25V & 70V
  • Sensitivity: 91 dB
  • Material: Metal
  • Frequency Response: 100-8,000 Hz
  • Connectors: Wire & Lock-Screw
  • Color: White
  • Diameter: 7.7″ (196 mm)
  • Weight: 4.1 lbs (1.86 kg)
  • Shipping Weight: 4.9 lbs (2.3 kg)
  • Size (W×H×D): 7-7/16″ × 5-5/16″ × 2″ (188 × 134 × 50 mm)
Structure Speaker Frequency Response

Click PDF IconPDF Iconto download printer friendly file format of product specs.

Click Get Adobe Reader to download a free copy of Adobe Acrobat Reader.

• Soundproofing Products • Sonex™ Ceiling & Wall Panels • Sound Control Curtains • Equipment Enclosures • Acoustical Baffles & Banners • Solid Wood & Veneer Acoustical Ceiling & Wall Systems • Professional Audio Acoustics • Vibration & Damping Control Fire Retardant Acoustics • Hearing Protection • Moisture & Impact Resistant Products • Floor Impact Noise Reduction • Sound Absorbers • Noise Barriers • Fabric Wrapped Wall Panels • Acoustical Foam (Egg Crate) Acoustical Sealants & Adhesives • Outdoor Noise Control • Assistive Listening Devices • OSHA, FDA, ADA Compliance • On-Site Acoustical Analysis • Acoustical Design & Consulting • Large Inventory • Fast Shipment • No Project too Large or Small • Major Credit Cards Accepted

sound absorption noise blocking fabric wrapped panels soundproof foam
noise barriers acoustical panels soundproofing drywall