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Atlas B51-4

4" ceiling-mount speaker with baffle

Item # 978B514

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Overview

Our take on the Atlas B51-4

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.

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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Product Highlights:

  • 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
  • Transformer
  • Grill
  • Mounting screws
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Details

Hands-on research

Features and Specs

General
Drivers per speaker 1
Woofer Size (inches) N/A
Tweeter Size (inches) N/A
System Frequency response 150-17,000
Maximum SPL N/A
Power Handling
Power rating 10 Watts
Peak Power rating ---
Specs
Width (inches) 4
Height (inches) ---
Depth (inches) 2-1/4
Weight 2.83 lbs

Product Research

Features

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.

Specifications:

  • 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

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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