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The black CM400i 4" Coaxial In-Ceiling Speaker by SoundTube is a two-way, blindmount, in-ceiling speaker that delivers effective low-end response and optimal off-axis performance. The CM400i speaker design incorporates a low-profile grille and five position tap switch with a transformer bypass position. Mounting hardware is included and features a fast and secure constant-tension fixed-wing mounting system.
One 4" polypropylene woofer and one 1" convex aluminium tweeter with FerroFluid cooling
Rapid installation blind-mount, fixed-wing mounting mechanism with constant tension design affixed to ceiling
Separate tool-free magnetic grille and bezel assembly for ease of install and in-field painting
Powder-coated steel grille for lasting durability
90 dB average sensitivity, offers high output capabilities and reduced amplification costs
High-quality black paint finish
In the Box
SoundTube Entertainment CM400i 4" Coaxial In-Ceiling Speaker (Black)
Color-coded (orange) tile bridge
UL cover plate
Limited 5-Year Warranty
Table of Contents
48" coaxial, in-ceiling, ported (20 W transformer for 25, 70.7, 100 VDC or transformer bypass)
4 Ω nominal
90 dB @ 2.83 V/1 m 87 dB @ 1 W/1 m (1 W 1 m sensitivity determined using nominal impedance)
90 Hz - 22 kHz @ -3 dB 75 Hz - 22 kHz @ -10 dB (Frequency response measured in half or full space as dictated by speaker mounting configuration)
Frequency response measured in half or full space as dictated by speaker mounting configuration.
Max. Program Power
40 W (Max program power is 3 dB above max continuous power)
Max. Continuous Power RMS
20 W (Continuous power rating, EIA-426-B test)
Max. power SPL
100 dB @ 1 m (Max output based on max continuous power)
100º (-6 dB @ 2 kHz) 65º (-6 dB @ 10 kHz) 95º (averaged 2-10 kHz)
4.6 (averaged 100 Hz - 10 kHz) 4.3 (2 kHz)
5.6 dB (averaged 100 Hz - 10 kHz) 6.3 dB (2 kHz)
5-position rotary switch with transformer bypass position