The SoundTube RS400i is a 4” two-way ported pendant speaker engineered for high-performance indoor and outdoor audio applications. Featuring an open-ceiling enclosure design, the RS400i delivers effective low-end response down to 76 Hz and 125° off-axis coverage (2–10 kHz, independently verified). SoundTube’s proprietary BroadBeam® waveguide tweeter system ensures consistent, high-intelligibility sound across the entire listening area.
Designed for ease of installation, the RS400i includes UL-listed hanging hardware, adjustable galvanized steel cables, and a SpeedClamp™ self-locking cable grip for secure and fast mounting. Power management is simplified with a five-position tap switch and transformer bypass, supporting 25, 70.7, and 100V applications.
SoundTube RS400i Key Features
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BroadBeam® waveguide tweeter system for consistent dispersion and edge-to-edge coverage
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4” polypropylene woofer + 1” convex titanium tweeter with FerroFluid cooling
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Weatherized components for indoor and outdoor use
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UL-listed hanging hardware with SpeedClamp™ cable grip
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ZeroReflection™ enclosure for optimal sound reproduction and cabinet rigidity
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Five-position tap switch with transformer bypass for flexible installations
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Steel grille with powder-coated finish for long-lasting durability
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High sensitivity (82.5 dB) for efficient high-output performance
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UL 1480A approved, black or white paint finish; custom colors available
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Optional AC-RS-SM5 bracket for surface-mount installations
Ideal Applications
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Casinos
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Conference rooms
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Grocery stores
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Hotels
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Museums
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Restaurants
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Retail stores
The RS400i combines professional-grade audio performance, flexible installation options, and durable construction, making it perfect for a wide range of commercial and public spaces.
Soundtube RS400I Specifications
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Frequency Response(-3 dB)
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95 Hz – 20 kHz
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Low Frequency(-10 dB)
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76 Hz – 22 kHz
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Sensitivity
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82.5 dB
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Power Capacity RMS
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20 W
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Max SPL dB @ 1 M
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95.5 dB
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Nominal Impedance
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4 ohms
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Tweeter
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1 in. Broad Beam
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Woofer
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4.0 in. Poly
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Connections
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Four-pin Euro block
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Height
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223.5 mm (8.80 in.)
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Diameter
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195.6 mm (7.70 in.)
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Weight
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2.3 kg (5.0 lbs.)
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