Soundtube CM42-EZs-II-BK Black 4" Coax In-Ceiling Speaker

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The Soundtube CM42-EZs-II is a 4-inch, coaxial, two-way, blind-mount, in-ceiling speaker which delivers true high efficiency and performance across the operating bandwidth. By incorporating a 4-inch treatedfiber driver with cloth surround in a sealed drawn steel backcan, this speaker delivers maximum frequency response (125 Hz  22 kHz, - 10 dB) in a compact design.

Mounting hardware is included and features a constant-tension winged mounting system with a 21-gauge fullmetal steel tile bridge ensuring rapid and secure installation in any sheetrock or drop-tile application. For easy ordering, stocking and installation, this series includes a color-coded (orange) tile bridge, optional pre-construction bracket, and a six-position tap switch for 25, 70.7 and 100-volt applications with transformer bypass position.


  • Engineered for applications with lim­ited plenum space incorporating a Sound­Tube-specific shallow backcan with an installed depth of only 3.5 inches.
  • One 4 inch (102 mm) treated fiber woofer with cloth surround and one 0.75 inch (19 mm) silk dome tweeter.
  • Easy-access six-position tap switch for 25/70.7/100-volt and 16 ohm transformer bypass position allows for easy ordering, stocking and installation.
  • Reduced amplification costs with maxi­mum efficiency including 87.5 dB sensitiv­ity and 16 ohm impedance.
  • Superior voice intelligibility with an average coverage angle of 100° (210 kHz, independently verified).
  • Cost-effective 16 ohm settings allows for the use of multiples of two, four, or six speakers in a system using a standard amplifier without a transformer.
  • Incorporates a painted steel grille for lasting durability.
  • Clamping allowance from 0.00 in. (0.0 mm) to 1.50 in. (38.1 mm).
  • UL 1480 (UEAY) and 2043, CE (EMC Directive 89/366/EEC, EN55020, EN55013) approved.
  • High-quality black or white painted fin­ish. Custom colors available.
  • Included accessories: Tile bridge, UL-listed 0.5-inch flex conduit clamp, paint shield and two wire nuts.
  • Optional accessories: Color-coded (orange) pre-construction bracket (AC-CM4-PCB), junction box (AC-CM-EZ-JBOX).
  • Specifications
    • Frequency Response(-3 dB): 160 Hz - 20 kHz
    • Low Frequency(-10 dB): 125 Hz - 22 kHz
    • Sensitivity: 87.5 dB
    • Power Capacity RMS: 20 W
    • Max SPL dB @ 1 M: 100.5 dB
    • Nominal Impedance: 16 ohm
    • Tweeter: 0.75 in. Silk
    • Woofer: 4 in. Treated fiber
    • Visible Height: 0.33 inches
    • Visible Diameter: 7.50 inches
    • Backcan Height: 3.75 inches
    • Backcan Width: 5.78 inches
    • Weight: 4.0 lbs
    • Shipping Weight: 5.0 lbs
    • Colors: Black or white
    • This model is BLACK