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The white SM400i 4” Surface-Mount Speaker from SoundTube Entertainment is a coaxial, ported speaker with a low-profile surface-mount enclosure design for indoor/outdoor applications. The proprietary BroadBeam waveguide technology incorporates a high-frequency waveguide mated to a 1” convex aluminum tweeter. It helps deliver a consistent dispersion pattern across the upper registers of the frequency spectrum.
This speaker features a corrosion-resistant Stealth U-bracket for easy and secure installation. The bracket utilizes one way fasteners for tool-free, theft-resistant security. The SM400i Speaker incorporates a five-position tap switch with transformer bypass position. Included port plugs can be used for added weather resistance. It delivers high-quality music and messaging for indoor and outdoor background to mid-level SPL applications. This surface-mount speaker is suitable for use in retail shops, grocery stores, restaurants, hotels, casinos, museums, trade shows, and conference rooms.
BroadBeam waveguide technology delivers a consistent dispersion pattern up to 10 kHz for a wide coverage area
Features a 4" polypropylene woofer and 1" convex titanium tweeter with FerroFluid cooling
Includes port plugs and weatherized components for indoor and outdoor applications
Easy access, five-position selectable tap switch for 25, 70.7, and 100V applications with transformer bypass position
Iridite-plated aluminum grille with protective powder-coated finish for lasting durability
Includes a tool-free Stealth U-bracket mounting system for fast and secure installation
Vertical and horizontal mounting offer precision aiming for indoor and outdoor applications
UL 1480 (UEAY) and CE approved
White paint finish
In the Box
SoundTube Entertainment SM400i 4" Surface-Mount Speaker (White)
U-Bracket Mount with Safety Cable
Terminal Weather Boot
Limited 5-Year Warranty
Table of Contents
4" (102 mm) coaxial, surface-mount, ported (20 W transformer for 25/70.7/100 V or transformer bypass)
2.83 V/m: 85.5 dB 1 W/m: 82.5 dB
Average over published frequency response range. 1 W/m sensitivity based on voltage required to yield 1 W based on the minimum system impedance.
-3 dB: 97 Hz to 22 kHz -10 dB: 76 Hz to 22 kHz
Program Power: 35 W Continuous Power RMS: 20 W
Continuous power rating, EIA-426-B test.
Max SPL Level
95.5 dB @ 3.3' (1.0 m)
-6 dB @ 2 kHz: 125° horizontal / 165º vertical -6 dB @ 10 kHz: 75° horizontal / 70º vertical Ave from 2 to 10 kHz: 125° horizontal / 125° vertical
Angle of Pointability: 0 to 90° horizontal
Q, 3.7 (averaged 100 Hz to 10 kHz); 3.9 @ 2 kHz
DI, 4.9 dB (averaged 100 Hz to 10 kHz); 5.9 dB @ 2 kHz
Weather-proof, five-position tap switch with transformer bypass position
Low Frequency Driver
1 x 4" (102 mm) polypropylene cone, butyl rubber surround
High Frequency Driver
1 x 1" (25 mm) convex titanium tweeter with waveguide
Low Frequency Voice Coil
1" (25 mm)
Low-Pass & High-Pass: 12 dB per octave, 2nd order
Injection-molded ABS, glass fiber reinforced
1 x four-pin, 5.08 mm Euroblock for individual or daisy chain connection
70.7 V Output: 20 W (95.5 dB), 10 W (92.5 dB), 5 W (89.5 dB), and 3 W (86.5 dB) 100 V Output: 20 W (95.5 dB), 10 W (92.5 dB), and 5 W (89.5 dB) 25 V Output: 3 W (86.5 dB), 1 W (83.5 dB), 0.63 W (80.5 dB), and 0.31 W (77.5 dB)
UL, CE, and RoHS
Dimensions (H x W x D)
9.7 x 6.9 x 7.5" (24.6 x 17.7 x 19.0 cm) (including bracket)