4" ceiling-mount speaker with baffle
Our take on the Atlas B51-4 by Crutchfield's Eric Angevine
An all-purpose in-ceiling loudspeaker
The Atlas B51-4 loudspeaker is a great all-purpose choice for your business establishment. Use the built-in transformer tap to power multiple speakers with a commercial amplifier, and you can offer pleasant background music and clear voice announcements throughout your space. Each speaker includes a white powder-coated baffle, so it will blend easily into your decor.
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- 4" full-range driver
- white powder-coated baffle included
- frequency response: 150-17,000 Hz (±5dB)
- 94 dB sensitivity
- 135° distribution pattern
- built-in 25/70V transformer with power taps: .25, .5, 1, 2, and 4 watts
- 2-1/4" mounting depth
- weight: 2.83 lbs.
- warranty: 5 years
- Our 60-day money-back guarantee
What's in the Box:
- One 4" Speaker
- Mounting screws
Features and Specs
|Drivers per speaker||1|
|Woofer Size (inches)||N/A|
|Tweeter Size (inches)||N/A|
|System Frequency response||150-17,000|
|Power rating||10 Watts|
|Peak Power rating||---|
Overview: The Atlas B51-4 is a 4", 25/70 volt in-ceiling speaker featuring the popular Atlas FC104 high performance driver. The speaker provides wide-angle sound dispersion allowing fewer speakers to be needed in a distributed system and is ideal for commercial paging and background music applications in offices, reception areas, waiting rooms and many other applications. It features a 10 ounce ceramic magnet and a damped, high-compliance cone that provides excellent low frequency reproduction with a smooth extended response. The B51-4 is UL 1480 rated, for general signaling, and UL2043 rated, for use in plenum spaces and comes ready to install with an included grill, transformer, and mounting screws.
25/70 Volt: The B51-4 can be used in either 25 volt or 70.7 volt systems. Tap settings for 70 volt include: 0.25 W, 0.5 W, 1 W, 2 W, and 4 W. An included pigtail of multi-colored wires is used to access each tap setting.
- Speaker Size: 4"
- Sensitivity: 94 dB (1W/1M)
- Power Rating: 10 W program
- Frequency Response: 150 Hz - 17 kHz
- Dispersion: 135˚/-6 db, 2 kHz octave band
- Dimensions: Diameter - 4.0", Depth - 2.250"
- Shipping Weight: 2.83 lbs.
Our Product Research Team
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