SoundTube CM31‑EZ 3-Inch In‑Ceiling Full‑Range Speaker

The SoundTube CM31‑EZ is a premium 3″ full‑range in‑ceiling speaker featuring a polypropylene cone with butyl rubber surround, housed in a shallow steel backcan and ABS baffle. Ideal for commercial paging, background music, or voice alarm systems, it supports both low‑impedance and multi‑tap transformer modes.

Available in single-unit Black (CM31‑EZ‑BK), single-unit White (CM31‑EZ‑WH), or White 3‑pack (CM31‑EZ‑WH MP), the CM31‑EZ offers consistent audio performance regardless of finish or pack size. Installation is fast with a tile bridge or optional pre‑construction bracket, and it’s built for indoor or outdoor-rated use.

Key Features

• Driver: 3″ high‑fidelity polypropylene with butyl rubber surround
• Power Handling: 20 W RMS continuous; 40 W program
• Sensitivity: 85 dB @ 1 W/1 m (also @ 2.83 V/1 m)
• Frequency Response (±3 dB): 190 Hz–14 kHz; (±10 dB): 135 Hz–22 kHz
• Impedance: Nominal 8 Ω; taps for 25 V, 70.7 V, 100 V or transformer bypass
• Installation: SpeedWing™ constant-tension blind-mount with tile bridge or optional pre‑construction bracket
• Grille: Corrosion‑resistant, powder‑coated aluminum; snap‑fit
• Coverage Angle: ~175° (±6 dB @ 2 kHz), ~45° @ 10 kHz; averaged 120° (2–10 kHz)
• IP Rating: IP54, weatherized for indoor/outdoor use
• Certifications: UL‑1480A, UL 2043, CE, RoHS; 5-year limited warranty
• Color Options: Black, White (single), White (3‑pack)

Technical Specifications

• Nominal Impedance: 8 Ω
• Sensitivity: 85 dB @ 1 W/1 m (2.83 V/1 m)
• Frequency Response ±3 dB: 190 Hz–14 kHz
• Frequency Response ±10 dB: 135 Hz–22 kHz
• Power Handling: 20 W RMS continuous; 40 W program
• Max SPL @ 1 m: 98 dB
• Coverage Angles: 175° @ 2 kHz; 45° @ 10 kHz; averaged 120° (2–10 kHz)
• Directivity Factor (Q): 4.5 (avg 100 Hz–10 kHz), 3.5 @ 2 kHz
• Directivity Index (DI): 5.3 dB (avg), 5.2 dB @ 2 kHz
• Backcan Diameter: 5.5″ (139.7 mm)
• Backcan Height: 3.5″ (88.9 mm)
• Visible Diameter: 6.3″ (160 mm)
• Visible Height: 0.6″ (15.2 mm)
• Weight (per unit): 3.1 lbs (1.4 kg)
• Shipping Weight (single): 3.7 lbs (1.68 kg)
• Included Accessories: Tile bridge, conduit clamp, paint mask, wire nuts

What’s Included

• One CM31‑EZ speaker (Black or White finish)
• Magnetic aluminum grille (matching finish)
• Tile bridge (or optional pre‑construction bracket)
• Conduit connector, paint mask, and wire nuts