SoundTube IW31‑EZ 3-Inch In‑Wall Transformer Speaker

The IW31‑EZ is a premium 3″ full‑range in‑wall speaker available in Black or White finish, designed for low‑impedance (8 Ω) home or commercial audio systems and distributed (25/70.7/100 V) installations. Weatherized for indoor or outdoor use (IP54), it offers ultra‑compact mounting behind a standard wall plate footprint.

Installation is fast and secure via the Speed Wing™ constant‑tension blind‑mount system that accommodates wall thicknesses from 0.1″ to 1.5″. A six‑position rotary tap switch (including transformer bypass) enables versatile power matching for distributed systems.

Black (IW31‑EZ‑BK) and White (IW31‑EZ‑WH) single‑unit versions are sold individually; master packs (MP) of 8 units are available in both colors.

Key Features

• Driver: 3″ polypropylene cone with butyl rubber surround
• Impedance: 8 Ω direct or transformer‑tapped (25/70.7/100 V)
• Power Handling: 20 W continuous RMS, 40 W program
• Sensitivity: 85.5 dB @ 1 W/1 m (2.83 V)
• IP Rating: IP54 – weatherized components for indoor/outdoor use
• Mounting: Speed Wing™ fixed‑wing blind mount for walls up to 1.5″ thick
• Form Factor: 5″ × 5″ visible grille with shallow backcan
• Coverage: 45° beamwidth @ 2 kHz
• Accessories Included: Conduit clamp, paint mask, grille, wire nuts, hole template

Technical Specifications

• Frequency Response (±10 dB): 115 Hz – 22 kHz
• Frequency Response (±3 dB): 190 Hz – 14 kHz
• Max SPL @ 1 m: 98.5 dB (program power) per spec sheet
• Coverage Angle (±6 dB @ 2 kHz): 45° beamwidth
• Directivity Factor (Q): Avg 4.5 (100 Hz–10 kHz); 2.8 @ 2 kHz
• Directivity Index (DI): Avg 5.5 dB; 4.4 dB @ 2 kHz
• Transformer Taps Max Power (25/70.7/100 V): 1.3 W / 10 W / 30 W
• Mounting Depth: 3.5″ (88.9 mm)
• Cutout Size: 4.25″ (108 mm)
• Visible Dimensions: 5″ × 5″ (127 mm × 127 mm)
• Weight: 3.0 lbs (1.4 kg); Shipping Weight: 4.0 lbs (1.8 kg)

What’s Included

• IW31‑EZ speaker unit (single – Black or White)
• or 8‑pack master carton (Black or White)
• Aluminum grille (powder‑coated matching color)
• Conduit clamp and strain relief
• Paint mask and hole template
• Wire nuts