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Lowell SM820A

Lowell SM820A

Lowell SM820A
Item# SM820A

Product Description


SM820A: Sound Masking Speaker


Above ceiling 50W sound masking speaker with 8 in. coaxial driver, 70V transformer, grille and backbox with wire hangers, S-hooks and chain. Black finish.



  • Driver: 8 in. 50W coaxial driver (20 oz. magnet)
  • Transformer: 70V (0.25, 0.5, 1, 2, 4W). Selector switch includes "OFF" position
  • Enclosure: 760 cu in. volume (11.625 in. square x 5.625 in. deep), fiberglass lining, externally accessible input leads, SG handibox cover with knockouts, Romex connector for installations without conduit. Black.
  • Grille: Steel grille with round perforation pattern. Black.
  • Mounting Aids: Removable wire hangers, S-hooks, and 4 ft. chain. Does not include rigging hardware.


  • UL 1480 General Signaling U.S.A.
  • UL 2043 Return air plenum space
  • CSAC22.2 No.205-M1983 General Signaling Canada
  • Made in the U.S.A. with global components
  • Certified U.S. steel


  • The sound masking speaker assembly for suspended ceiling installations shall be Lowell Model SM820A, which shall include an 8in. 50W coaxialdriver with factory-wired transformer mounted in a 760 cu.in. steel backbox with grille and externally accessible speaker leads. The wired transformer shall be 70V with primary taps at 4, 2, 1, .5, and .25 watts. The assembly shall include an externally accessible rotary switch to adjust tap selections and include an "OFF" position. Speaker leads shall exit the backbox through a strain relief clamp on a single gang handibox cover. Backbox and grille shall have a black finish and include pre-mounted wire hangers (removable) with separate 4 ft. chain and S-hooks.