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SoundTube CM31-EZ

3" in-ceiling commercial speaker (White)

Item # 298CM31W

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Overview

Our take on the SoundTube CM31-EZ

If you need reliable sound reinforcement for background music and announcements, SoundTube's CM31-EZ in-ceiling speaker will do the job without breaking the bank. Each features a 3" full-range polypropylene driver with butyl rubber surround, and they're weather-resistant, so you can use them indoors and out.

In-ceiling speakers you can count on

If you need reliable sound reinforcement for background music and announcements, SoundTube's CM31-EZ in-ceiling speaker will do the job without breaking the bank. Each features a 3" full-range polypropylene driver with butyl rubber surround, and they're weather-resistant, so you can use them indoors and out.

A built-in transformer tap lets you use one amplifier to drive several speakers in an efficient distributed audio system. Fixed-wing mounting arms make installation easier, and the speaker's shallow steel back enclosure makes it a good fit for more in-ceiling locations.


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Product Highlights:

  • 3" full-range poly driver with butyl rubber surround
  • weather-resistant for indoor and outdoor use
  • ABS enclosure and all-steel back enclosure
  • built-in transformer for use with 70-volt commercial systems
    • power taps at .7, 1.3, 2.5, 5 and 10 watts
    • 8-ohm transformer bypass
  • power handling: 40 watts continuous program power (when using transformer bypass)
  • frequency response: 218-14,000 Hz (±3dB)
  • maximum SPL: 98 dB
  • convenient fixed-wing mounting mechanism
  • corrosion-resistant powder-coated aluminum grille
  • fixed-wing mounting arms make installation easier
  • cutout diameter: 6-5/16"
  • depth: 3-1/2"
  • weight: 3.1 lbs.
  • warranty: 5 years
  • Our 60-day money-back guarantee

What's in the Box:

  • One in-ceiling speaker
  • Grill w/attached safety restraint
  • Conduit clamp
  • 2 Wire nuts
  • Paint guard
  • Installation instructions
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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 190-14k
Maximum SPL 98.0
Power Handling
Power rating 20
Peak Power rating ---
Specs
Width (inches) 6
Height (inches) 4-3/8
Depth (inches) 3-5/8
Weight 3.1 lbs

Product Research

Features

Overview: The Soundtube CM31-EZ is a blind-mount in-ceiling speaker featuring a single 3" high-excursion, high-fidelity, full-range driver. The speaker features transformer tap settings for 25, 70, and 100 volt operation and also includes a 8Ω bypass. Utilizing weatherized components, the CM31-EZ is designed specifically for paging and background music in indoor and outdoor applications, the speaker is ideal for hotels, restaurants, airports, churches, and similar applications.

Drivers: The CM31-EZ features a 3" high-fidelity polypropylene driver with a butyl surround, all mounted in a sealed steel backcan enclosure. This combination delivers high efficiency and performance across the operating bandwidth with a frequency response of 190Hz to 14kHz (-3db). Able to handle up to 20 watts RMS (40 watts Program power) and with a sensitivity of 85 dB, the CM31-EZ can provide clear powerful sound with a coverage angle of up to175˚ (@ 2kHz).

Enclosure: The CM31-EZ is housed in a galvanized steel backcan with an ABS plastic front baffle along with a corrosion-resistant powder-coated aluminum grill. The grill can be painted to match the room color and includes an attached safety restraint lanyard. The CM31-EZ enclosure carries both UL1480A and UL2043 UL certifications and is CE and RoHS approved.

Mounting: Installation of the speaker is done blind-mount using Soundtube's proprietary SpeedWing mounting arms. Two constant-tension, winged assemblies come pre-mounted to the speaker. Once the speaker is slid into the ceiling opening 2 Phillips-head screws on the front of the speaker are tightened. This expands out the SpeedWing mounting arms providing tension on the backside of the mounting surface. The CM31-EZ can be mounted to ceilings ranging in thickness from 0.1 to 1.5 inches, including drop-ceilings using the optional Tile Bridge (not included).

25/70/100 Volt: The CM31-EZ can be used in 25, 70, and 100 volt applications and includes a 8Ω bypass selection. A tap selection dial on the front of the speaker allows for easy configuration without having to remove the speaker from the ceiling. The following tap settings are available:

  • 25 Volt: 0.1W, 0.2W, 0.4W, 0.7W, and 1.3W
  • 70 Volt: 0.7W, 1.3W, 2.5W, 5W, and 10W
  • 100 Volt: 1.3W, 2.5W, 5W, and 10W
  • 16Ω

Terminals: Wiring for the speaker consists of a pair of bare-ended 18 ga. wires that extend approximately 2" from the back of the enclosure.

Specifications:

  • Speaker Type: 3" Full-range, high-excursion polypropylene driver with butyl rubber surround
  • Impedance (nominal): 8Ω
  • Sensitivity (1W @ 1M): 98dB
  • Frequency Response (-3 dB): 218Hz - 14kHz
  • Frequency Response (-10 dB): 135Hz - 22kHz
  • Maximum Program Power: 40W
  • Maximum Continuous Power: 20W
  • Maximum SPL: 98dB
  • Coverage Angle (-6dB @ 2kHz): 175˚
  • Coverage Angle (-6dB @ 10kHz): 45˚
  • Coverage Angle (Avg. 2 to 10kHz): 120˚
  • Crossover Frequency: 4.0kHz
  • Tap Settings:
    • 25 Volt: 0.1W, 0.2W, 0.4W, 0.7W, and 1.3W
    • 70 Volt: 0.7W, 1.3W, 2.5W, 5W, and 10W
    • 100 Volt: 1.3W, 2.5W, 5W, and 10W
    • 16Ω
  • Enclosure Material: Sealed drawn-steel backcan, ABS front baffle
  • Grill: Corrosion-resistant, power-coated aluminum
  • Inputs: Bare-ended 18 AWG wire
  • Dimensions: Diameter - 6.0", Depth (incl. grill) - 4.375"
  • Mounting Depth: 3.625"
  • Cutout Diameter: 5.530"
  • Maximum Ceiling Thickness: 0.10" to 1.50"
  • Weight: 3.1 lbs.

Our Product Research Team

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