SoundTube CM400i In Ceiling Speaker in White

One 4.0 inch polypropylene woofer and one 1.0 inch convex aluminum tweeter with FerroFluid cooling. Rapid installation blind-mount, fixed- wing mounting mechanism with constant tension design affixing to ceiling thicknesses ranging from 0.025 inch (0.6 mm) to 1.87 inch (47.5 mm). 


Easy access five-position selectable tap switch for 25-, 70.7- and 100-volt applications with transformer bypass position. Separate tool-free magnetic grille and bezel assembly for ease of install and in-field painting. Powder-coated steel grille for lasting durability.

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    Manufacturer’s Suggested Retail Price 
    Manufacturer’s CategoryCMi In-Ceilings
    Shipping Weight7.25 lbs / 3.29 kg
    Carton Height9.25 in / 234.95 mm
    Carton Length10 in / 254 mm
    Carton Width10 in / 254 mm
    CertificationsCE, RoHS, UL1480A, UL2043
    Enclosure PropertiesABS, Ported, Steel
    Enclosure Volume104 cu in / 1704.25 cu cm
    Included AccessoriesConduit Plate, Euroblock, Grille, Paint Mask, Tile Bridge
    Optional AccessoriesWH Grill (GRL-CM400-WH)|Tile Bridge (AC-CMEZ42-TB)|Pre-Construction Bracket (AC-CMEZ4-PCB)|Junction Box (AC-CM-JBOX)|Connector (EUROBLOCK)
    Source Inputs4 Pin 5.08mm Euroblock
    Backcan Diameter6.05 in / 153.7 mm
    Backcan Height6.55 in / 166.4 mm
    Coverage Angle (-6dB @ 2kHz)65°
    Crossover Frequency1.8 kHz
    Cutout Width/Diameter6.6 in / 167.6 mm
    Directivity Factor (Q) (Averaged 100Hz – 10kHz, @ 2kHz)4.6 and 4.3
    Directivity Index (DI) dB (Averaged 100Hz – 10kHz, @ 2kHz)5.6dB and 6.3dB
    Frequency Response (± 10 dB)75 Hz – 22 kHz
    Frequency Response (± 3 dB)90 Hz – 22 kHz
    Grille PropertiesStandard-Flange, Magnetic, Powder-Coated, White, Paintable, Steel
    Low Frequency Voice Coil0.75 in / 19 mm
    Low Pass Crossover12 dB per octave 2nd order
    Magnetically BoostedNo
    Max. Ceiling Thickness1.87 in / 47.5 mm
    Max. Continuous Power RMS20W
    Max. Program Power40 W
    Minimum Impedance (Ω Ohms)3.3 Ω
    Minimum Ceiling Thickness0.02 in / 0.6 mm
    Network Type: High Pass12 dB per octave 2nd order
    Nominal Impedance (Ω Ohms)4 Ω
    Tweeter Driver1″ Convex Aluminum w/ BroadBeam® Waveguide
    Woofer Driver4″ Polypropylene
    Sensitivity dB @ 1W/1M87 dB
    Sensitivity dB @ 2.83V/1M90 dB
    Tap SelectorRotary Switch
    Transformer Options25 / 70.7 / 100 V, 4 Ohm direct
    Transformer Taps (25V/70.0V/100V)2.5W/20W/20W
    Visible Diameter8.15 in / 207 mm
    Visible Height0.47 in / 11.9 mm