About the SoundTube CM42-EZs-II
A great fit in tight spaces
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A great fit in tight spaces
SoundTube's CM42-EZs-II is less than 4" deep, so it can be installed in spaces where other in-ceiling speakers won't fit. Each speaker has a 4" treated fiber woofer with cloth surround and 3/4" silk dome tweeter.
A built-in transformer tap lets you use one amplifier to drive several speakers in an efficient distributed audio system. Convenient mounting arms make installation easier.
Product highlights:
- 4" treated fiber woofer with cloth surround and 3/4" silk dome tweeter
- 100° conical coverage
- shallow-mount drawn steel back enclosure
- built-in transformer for use with commercial sound systems
- 70V taps: 1.25, 2.5, 5, 10 and 20 watts
- 100V taps: 2.5, 5, 10 and 20 watts
- 16-ohm transformer bypass
- power handling: 40 watts continuous program power (when using transformer bypass)
- frequency response: 160-20,000 Hz (-3dB)
- maximum SPL: 100.5 dB
- tile bridge, conduit clamp, and paint shield included
- painted steel grille
- constant-tension winged mounting hardware makes installation easier
- cutout diameter: 6-1/2"
- depth: 3-3/4"
- weight: 4 lbs.
- warranty: 5 years
- Our 60-day money-back guarantee
- MFR # CM42-EZS-II-BK
What's in the box:
SoundTube CM42-EZs-II owner's manual
- One in-ceiling speaker (black)
- Grille w/attached safety restraint
- Terminal cover plate
- Conduit clamp
- Paint guard
- Installation instructions
- Quality control sheet
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More details on the SoundTube CM42-EZs-II

Features & specs
General | ||
---|---|---|
Drivers per speaker | 2 | |
Woofer Size (inches) | 4.0 | |
Tweeter Size (inches) | 0.75 | |
System Frequency response | 160-20k | |
Maximum SPL | 100.5 | |
Power Handling | ||
Power rating | 20 | |
Peak Power rating | --- | |
Specs | ||
Width (inches) | 7-1/2 | |
Height (inches) | 4-3/16 | |
Depth (inches) | 3-13/16 | |
Weight | 4 lbs |
Product Research
Features
Overview: The Soundtube CM42-EZ-II is a 2-way, blind-mount, in-ceiling speaker featuring a coaxially mounted 4" woofer and a 0.75" tweeter. The speaker features transformer tap settings for 25, 70, and 100 volt operation, and also includes a 16Ω bypass. Designed specifically for indoor paging and background music, the CM42-EZ-II is ideal for hotels, restaurants, airports, churches, medical facilities, and more.
Drivers: The CM42-EZ-II features a 4" treated fiber woofer with cloth surround along with a 1" silk dome tweeter, all mounted in a sealed steel backcan enclosure. This combination delivers high efficiency and performance across the operating bandwidth with a frequency response of 160Hz to 20kHz (-3db). Able to handle up to 20 watts RMS (40 watts Program power) and with a sensitivity of 87.5 dB, the CM42-EZ-II can provide clear powerful sound with a coverage angle of up to 170˚ @ 2kHz, and 100˚ average coverage angle @ 2-10kHz.
Enclosure: The CM42-EZ-II is housed in a galvanized steel backcan with an ABS plastic front baffle along with a painted steel-mesh grille. The grille can be painted to match the room color and includes an attached safety restraint lanyard. The CM42-EZ-II enclosure carries both UL1480A and UL2043 certifications and is CE and RoHS approved.
Mounting: Installation of the speaker is done blind-mount using Soundtube's constant-tension winged assemblies that 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 CM42-EZ-II can be mounted to ceilings ranging in thickness from 0.04 to 1.5 inches, including drop-ceilings using the optional Tile Bridge. Three secondary attachment points are provided on the back of the speaker for an additional safety line.
25/70/100 Volt: The CM42-EZ-II can be used in 25, 70, and 100 volt applications and includes a 16Ω 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: 0.2W, 0.4W, 0.7W, 1.3W, and 2.5W
- 70 Volt: 1.3W, 2.5W, 5W, 10W, and 20W
- 100 Volt: 2.5W, 5W, 10W, and 20W
- 16Ω
Terminals: A 4-position ceramic terminal strip is provided for wiring connections. One set of terminals provides the signal input while the other set provides a pass-thru for daisy-chaining multiple speakers. Each terminal can accommodate speaker wire up to 10AWG in size and includes a set-screw to hold the wire firmly in place.
Specifications:
- Speaker Type: 4.0", coaxial, in-ceiling
- Woofer: 4.0" treated fiber cone with cloth surround
- Tweeter: 0.75" Silk dome
- Impedance (nominal): 16Ω
- Sensitivity (1W @ 1M): 87.5dB
- Frequency Response (-3 dB): 160Hz - 20kHz
- Frequency Response (-10 dB): 125Hz - 22kHz
- Maximum Program Power: 40W
- Maximum Continuous Power: 20W
- Maximum SPL: 100.5dB
- Coverage Angle (-6dB @ 2kHz): 170˚
- Coverage Angle (-6dB @ 10kHz): 95˚
- Coverage Angle (Avg. 2 to 10kHz): 100˚
- Crossover Frequency: 5.0kHz
- Tap Settings:
- 25 Volt: 0.2W, 0.4W, 0.7W, 1.3W, and 2.5W
- 70 Volt: 1.3W, 2.5W, 5W, 10W, and 20W
- 100 Volt: 2.5W, 5W, 10W, and 20W
- 16Ω
- Enclosure Material: Sealed drawn-steel backcan, ABS front baffle
- Grille: Painted steel-mesh
- Inputs: 4-Terminal ceramic barrier strip
- Dimensions: Diameter = 7.462", Depth (incl. grille) = 4.150"
- Mounting Depth: 3.80"
- Cutout Diameter: 6.402"
- Maximum Ceiling Thickness: 0.04" to 1.50"
- Weight: 4.0 lbs.
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