Atlas Sound B51-4

4" Loudspeaker Combo Package FC104T72/51-4

OUR PART #:  B51-4 Write the First Review.

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Easy to order 4" speaker/transformer/grill assembly Attractive white finish Suited for any commercial paging or BGM application

This attractive B51-4 loudspeaker assembly combines the sound performance of a full range 4" high compliance loudspeaker with the job site convenience and economy of a factory-assembled loudspeaker, transformer and baffle.

Model incorporates the popular Atlas Sound FC104 high performance loudspeaker, recognized for full-range voice and music reproduction. Unit provides wide-angle sound dispersion to achieve desired coverage with fewer loudspeakers in distributed systems.

Each loudspeaker employs a 10 ounce ceramic magnet and a damped, high-compliance cone to provide excellent low-frequency reproduction with smooth extended response. Package includes factory-mounted, dual-voltage 70.7/25V or 70.7V transformer and round grille with screw mount installation.


  • Depth 2" (5.72 cm)
  • Diameter 4" (10.16 cm)
  • Shipping Weight 2.83 lbs (1.28 kg)
  • Frequency Response 100Hz - 10kHz (+/- 1.5dB)
  • Power Taps 70.7V/25V
  • Speaker Type High Compliance
  • Dispersion 135°/ -6dB, 2kHz
  • Sensitivity 94dB (at 1W / 1M)

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