Soundtube CM890i-BK Black 8" High Power Coax In-Ceiling Speaker

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The Soundtube CM890i is a premium 8-inch, two-way, in-ceiling, high-efficiency, high-SPL loudspeaker for distributed or 8 ohm applications. The CM890i incorporates a dedicated 8-inch treated fiber driver and high-power compression transducer with a BroadBeamHP(R) waveguide to deliver a consistent dispersion pattern and superb intelligibility for the foreground music, sound reinforcement and PA markets. The CM890i also incorporates a 66-watt transformer with a six-position tap switch and transformer bypass position. Mounting hardware and tile-bridge are included and feature a fast and secure constant-tension fixed-wing mounting system.


  • Patented BroadBeamHP(R) 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, Euroblock connector and paint mask/installation aid.
  • Optional accessories: Color-coded (purple) pre-construction bracket (AC-CM8-PCB) and junction box (AC-CMi-JBOX).


  • Frequency Response(-3 dB): 80 Hz - 22 kHz
  • Low Frequency(-10 dB): 62 Hz - 22 kHz
  • Sensitivity: 93.0 dB
  • Power Capacity RMS: 125 W
  • 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: 1.08 inches
  • Visible Diameter: 14.76 inches
  • Backcan Height: 7.94 inches
  • Backcan Width: 11.68 inches
  • Weight: 14.3 lbs
  • Shipping Weight: 42.6 lbs Two per box
  • Colors: Black or white