Atlas Sound M1000 8-inch Dual Cone Sound Masking Speaker - Black The M1000 sound masking speaker assembly is designed to accurately reproduce the required spectrum of masking signal into the plenum space. The innovative 734 cubic inch square enclosure ensures ample low frequency response. A specially designed 8 dual cone speaker is included in the package. A high efficiency 70.7V internal transformer is coupled to an external tap selector switch for easy system tuning. The exclusive AtlasIED EZ hang brackets simplify installation. This innovative suspension system utilizes (2) collapsible plated hangers configured to allow quick upward downward or side firing installation. The hangers are factory-installed on the unit and fold flat for shipping. To meet most any local code requirement the M1000 includes an innovative cover containing both knockouts and a strain relief. This system will allow the use of rigid or flexible conduit (if required) and easily accommodates through connections on the removable plate. UL 2043 listed for use in air handling spaces. Installation is made easy via the optional 78 (2m) suspension chain system part MCHAIN72 that allows quick mounting and height adjustment of the M1000. An integral wire strain relief strategically located on the top of the enclosure allows for secure speaker cable termination. Note: This product requires a masking generator and 70.7V amplifier to operate. Features * Pre-Assembled Unit Includes 8 dia. Loudspeaker Transformer Enclosure Baffle and Mounting Hardware * Labor-Saving Hardware Package - Complete with New Snap Hanger Assembly Allows Quick and Easy Installation * Innovative Input Panel Includes Combination Knock-Out and Strain Relief Connector to Accommodate Flexible or Rigid Conduit * Design Enables Upward Downward or Horizontal Orientation * 734 cu in Enclosure for Extended Low Frequency Response * Available in Black or White Epoxy Finishes to Blend with a Variety of Open Ceiling Plans * Suitable for Use Above Suspended Ceiling Systems or Open Ceiling Spaces Approved for Use in Air Handling (Plenum Ceilings) * Safety Listed to UL 1480 & UL 2043 Specs * Loudspeaker: 8 Dual Cone * Magnet Weight: 10 oz (260 g) * Transformer Taps: .25 .5 1 2 & 4 Watts plus an off switch (plus an 8 Ω bypass on the M1000-W) * Sound Dispersion: Upward Downward or Horizontal * Enclosure Volume: 734 in3 (12 075.1 cm3 ) * Height: 5 1⁄2 (13.97 cm) * Length: 11 9⁄16 (29.4 cm) * Width: 11 9⁄16 (29.4 cm) * Weight: 9 lbs (3.4 kg)