The SoundTube CM400i is a premium 4” in-ceiling speaker designed for background to mid-level SPL applications, delivering high-fidelity sound with effective low-end response (75 Hz, -10 dB) and optimal off-axis performance (2–10 kHz, independently verified). Ideal for commercial, educational, hospitality, and public spaces, this speaker ensures consistent audio coverage for music, paging, and announcements.
The CM400i features a low-profile grille and five-position tap switch with transformer bypass for flexible installation in 25V, 70.7V, and 100V systems. Installation is fast and secure with the SpeedWing™ constant-tension fixed-wing mounting system, accommodating ceiling thicknesses from 0.025” to 1.87” (0.6–47.5 mm).
SoundTube CM400 Key Features
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4” polypropylene woofer with 1” convex aluminum tweeter and FerroFluid cooling
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Low-profile design with tool-free magnetic grille and bezel for ease of installation and in-field painting
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Rapid blind-mount installation with SpeedWing™ fixed-wing system
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Five-position tap switch with transformer bypass for flexible system integration
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Powder-coated steel grille for lasting durability
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90 dB average sensitivity for high output and reduced amplification costs
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UL 1480 (UEAY) and 2043 approved
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High-quality black or white paint finish, with custom colors optional
Included Accessories
Applications
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Courthouses, schools, retail stores, grocery stores, restaurants
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Hospitals, hotels, casinos, museums, conference rooms, and churches
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For additional low-end response, pair with SoundTube CM1001D-T or SM1001P 10-inch subwoofers
The CM400i delivers professional-grade audio performance, versatile installation, and reliable durability, making it ideal for any commercial or public space requiring quality in-ceiling sound.
