Lowell ULS-WB8-CT572
ULS 8" Speaker Assembly (Round Grille) for Fire Protective Signaling


Engineered to meet UL Standard 1480 5th edition, the ULSseries of speaker assemblies provides clear signal reproduction for indoor alarm evacuation and/or voice communication in fire alarm/emergency warning systems, as well as general voice communication for other applications. The assembly includes an 8” single voice coil speaker with a dual cone, 70/25V dual voltage transformer with power tap lugs, parallel input leads, DC blocking capacitor and round or square grille.

The 15-watt speaker delivers excellent sensitivity per UL’s measurement standard of 2W @ 10 feet. This recognized standard assures emergency communications can be heard and understood. The attractive white ceiling grille meets both functional and architectural considerations for unobtrusive life safety speakers and is suitable for use in hotels, apartment complexes, schools, and retail establishments of all kinds.

NOTE: The ULS fire protective signaling speaker assembly must be used with compatible control equipment and appropriate Lowell backbox to maintain UL Listing (order separately).


  • Meets UL Standard 1480 (Speakers for Fire Protective Signaling Systems) 5th edition.
  • UL 2043 rated for use in plenum spaces.**
  • Meets NFPA 72A.
  • Factory-wired transformer and DC blocking capacitor meet application requirements for 25V and 70V life safety and emergency signaling systems.
  • 15W speaker reproduces emergency alarm and voice instructions with high efficiency and clear intelligibility.
  • Assembly includes:
    – 8” single voice coil speaker with dual cone
    – Factory-wired 70/25V dual voltage transformer with power tap lugs, parallel input leads
    – DC blocking capacitor
    – Round (WB-8) or square (SG-8) white steel grille.
  • Ships ready for installation to specified Lowell backbox (required to maintain UL Listing – order separately).


  • Driver:  8" single voice coil speaker
  • Transformer:  70V / 25V
  • DC Blkg. Capacitor:  10 mfd @ 160V
  • Grille:  WB8, 12.875" diameter
  • Specified Backbox (not included - order separately):  UL-CP84 or UL-XCP84-S
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