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SoundTube - CM890i 8" Coaxial In-Ceiling Speaker (Single)

SoundTube - CM890i 8" Coaxial In-Ceiling Speaker (Single)
SoundTube - CM890i 8" Coaxial In-Ceiling Speaker (Single) SoundTube - CM890i 8" Coaxial In-Ceiling Speaker (Single)


The CMi series in-ceiling speakers are built to make the sound sing where ever they are installed! The SoundTube’s CMi series incorporates BroadBeam® full-frequency dispersion technology and fixed-wing installation features for any type of hanging-tile or sheet rock application.


  • Patented BroadBeamHP® waveguide technology delivers a consistent dispersion pattern for maximum intelligibility and edge-to-edge coverage.
  • A 66-watt transformer and high output for the sound reinforcement and PA markets.
  • One 8.0 inch treated fiber driver and one compression driver with a 1.0 inch exit mounted to a proprietary cast-aluminum baffle and heat sink.
  • Rapid-installation, blind-mount, fixed-wing mounting mechanism with constant-tension design affixes to ceiling thicknesses ranging from 0.25 inch (6.4 mm) to 1.91 inch (48.5 mm).
  • Easy access six-position selectable tap switch for 25-, 70.7- and 100-volt applications with transformer bypass position.
  • Separate tool-free magnetic grille and bezel assembly with integrated safety cable for ease of install and in-field painting.
  • Average sensitivity of 93.0 dB offers high-output capabilities and reduced amplification costs.
  • UL 1480 (UEAY) and 2043 approved.
  • High-quality black or white paint finish. Custom paint colors optional.
  • Included accessories: Tile bridge, conduit plate, Euro-block connector and paint mask/installation aid.
  • Optional accessories: Color-coded (purple) pre-construction bracket (AC-CM8-PCB) and junction box (AC-CMi-JBOX).



Low Frequency (-10 dB): 62 Hz - 22 kHz
Sensitivity: 93.0 dB
Power Capacity RMS: 125 W
Selectable: 25, 70.7, 100 Volt w/ Transformer
Max SPL dB @ 1 M: 114.0 dB
Nominal Impedance: 8 ohm
Transformer Options: 0.75 - 66 W
Woofer: 8 in. Treated fiber
Full-Range Drivers: 1 in. Compression driver
Connections: Four-pin Euroblock
Visible Height: 27.4 mm (1.08 in.)
Visible Diameter: 374.9 mm (14.76 in.)
Backcan Height: 201.7 mm (7.94 in.)
Backcan Width: 296.7 mm (11.68 in.)
Weight: 6.5 kg (14.3 lbs.)
Colors: Black or white

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