Soundtube CM800i-WH White 8" Coax In-Ceiling Speaker

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The Soundtube CM800i is an 8-inch, two-way, blindmount, in-ceiling speaker design that delivers extended low-end response (71 Hz) and optimal off-axis performance (2 to 10 kHz, independently verified). SoundTubes proprietary BroadBeam(R) waveguide tweeter system delivers consistent high-performance audio across the operating bandwidth. The CM800i speaker design incorporates a lowprofile grille, proprietary motor-board and six-position tap switch with transformer bypass position. Mounting hardware is included and features a fast and secure constant-tension, fixed-wing mounting system.


  • Patented BroadBeam(R) waveguide technology delivers a consistent BroadBeam(tm) dispersion pattern for maximum coverage area per speaker.
  • One 8.0 inch polypropylene woofer and one 1.0 inch convex titanium tweeter with FerroFluid cooling mounted to a proprietary cast-aluminum baffle and heat sink.
  • Rapid-installation, blind-mount, fixed-wing mounting mechanism with constant-tension design affixing 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.
  • Steel grille with protective powder-coated finish for lasting durability.
  • An average sensitivity of 90 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.
  • Optional accessories: Color-coded (purple) pre-construction bracket (AC-CM8-PCB) and junction box (AC-CMi-JBOX).


  • Frequency Response(-3 dB): 97 Hz - 22 kHz
  • Low Frequency(-10 dB): 71 Hz - 22 kHz
  • Sensitivity: 90.0 dB
  • Power Capacity RMS: 125 W
  • Max SPL dB @ 1 M: 111.0 dB
  • Nominal Impedance: 8 ohm
  • Tweeter: 1 in. BroadBeam(R)
  • Woofer: 8 in. Poly
  • 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: 12.5 lbs
  • Shipping Weight: 39.0 lbs