The SoundTube CM31-EZ-MP is a master pack of eight premium 3” full-range in-ceiling speakers, designed for 8-ohm or distributed audio applications in commercial, retail, or hospitality environments. Each speaker in the pack delivers high-fidelity sound with an ultra-compact design, making it ideal for ceiling installations where space and aesthetics matter.
Featuring a low-profile grille with a 6.3” diameter footprint and an integrated back can and driver, the CM31-EZ ensures professional-grade audio performance in a minimal space. Each speaker includes a six-position tap switch with transformer bypass for flexible system design and is built with weatherized components for indoor and outdoor use.
SoundTube CM31-EZ-MP Key Features
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Includes 8 CM31-EZ speakers for complete installations
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3” full-range polypropylene driver with butyl rubber surround for high-fidelity audio
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Shallow 3.5” steel back can with integrated driver and baffle
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Low-profile design with visible grille footprint of 6.3” (160.6 mm)
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Weatherized components suitable for indoor/outdoor applications
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SpeedWing™ fixed-wing mounting system for rapid blind-mount installation
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Six-position tap switch with transformer bypass
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Corrosion-resistant powder-coated aluminum grille with snap-fit attachment
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Ceramic input terminal accepts up to 10-gauge plenum-rated wire with thermal fuse
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Suitable for voice alarm applications under EU regulations EN60849 and BS5839-8
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UL 1480 (UEAY) and 2043 approved
Included Accessories
The CM31-EZ-MP Master Pack provides a complete, ready-to-install solution for high-performance in-ceiling audio, ensuring professional sound quality, rapid installation, and long-term reliability across multiple spaces.
SoundTube CM31-EZ-MP Specifications
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Low Frequency(-10 dB)
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135 Hz – 22 kHz
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Sensitivity
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85.0 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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98.0 dB
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Nominal Impedance
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8 ohm
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Transformer Options
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25 / 70.7 / 100 Volt option with a 8 Ohm direct
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Full-Range Drivers
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3″ poly
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Connections
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4 position ceramic terminal strip
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Visible Height
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15.2 mm (0.6 in.)
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Visible Diameter
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160.6 mm (6.3 in.)
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Back can Height
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88.9 mm (3.5 in.)
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Back can Diameter
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139.7 mm (5.5 in.)
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Weight
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1.4 kg (3.1 lbs.)
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Shipping Weight
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1.8 kg (4.0 lbs.)
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Optional Accessory
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Pre-construction bracket (AC-CM3-PCB) and 10″ powered subwoofer (SM1001p)
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Colors
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Black / White, or Custom
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