Product Overview

The SoundTube IW31-EZ MP is a professional 3-inch full-range in-wall speaker sold as a master pack of 8 units, purpose-built for large-scale commercial distributed audio deployments where installation efficiency and compact footprint are critical. Featuring an integrated backcan-and-driver design with a total visible footprint of 5 inches square, the IW31-EZ installs directly into standard wall plates without requiring a separate enclosure. Its Speed Wing constant-tension blind-mount mechanism secures to wall thicknesses from 0.1 to 1.5 inches, and the six-position transformer tap switch enables immediate compatibility with 25V, 70.7V, and 100V distributed audio systems as well as direct 8-ohm operation. Rated IP54 and certified CE, RoHS, UL1480A, and UL2043, the IW31-EZ is fully weatherized for both indoor and outdoor applications.

Product Description

When a commercial AV project requires dozens or hundreds of discreet in-wall speakers in hotel guestrooms, office corridors, retail fitting rooms, healthcare facilities, or educational hallways the SoundTube IW31-EZ delivers the right combination of acoustic performance, installation speed, and system flexibility at scale. The master pack of 8 units reduces per-unit freight cost and simplifies procurement for large projects.

At the heart of the IW31-EZ is a 3-inch polypropylene driver with a butyl rubber surround mounted in a sealed, injection-molded ABS glass fiber-reinforced backcan. This integrated one-piece design eliminates the need for a separate backcan purchase, reducing material costs and installation steps. The ultra-compact 5-inch square footprint and 3.5-inch mounting depth allow the IW31-EZ to fit into virtually any wall cavity, including thin partition walls with depths as little as 0.1 inches.

The Speed Wing blind-mount fixed-wing system is the IW31-EZ’s defining installation advantage. Once the speaker is inserted into the cutout, the constant-tension wings deploy and grip the wall material from behind without requiring access to the wall cavity. This mechanism accepts wall thicknesses from 0.1 to 1.5 inches, covering drywall, plaster, and thin wood paneling equally well. A 4.25-inch square cutout is all that is required, and the included hole template makes accurate marking fast and consistent across multi-room projects.

The six-position rotary tap switch on each IW31-EZ selects the operating voltage tap for distributed audio integration: transformer taps support 25V (1.3W), 70.7V (10W), and 100V (30W) operation, plus a direct 8-ohm bypass position. This flexibility means the same speaker can be deployed across different AV system architectures on the same project without hardware substitutions. All IW31-EZ components are fully weatherized for IP54-rated protection against dust and water spray, qualifying it for outdoor-adjacent applications such as covered parking structures, outdoor corridors, and semi-exposed hospitality areas.

Each unit includes a conduit clamp, grille, hole template, paint mask, and wire nuts. Optional accessories such as the pre-construction bracket (AC-CM31-PCB), theft-resistant grille (AC-IW31-TRG), white grille (GRL-IW31-WH), and junction box (AC-CM-EZ-JBOX) further expand deployment options. Order the IW31-EZ MP master pack and supporting accessories at .

Key Features

• Master Pack of 8 Units Bulk packaging reduces per-unit freight cost and simplifies procurement for large-scale commercial installations requiring consistent, efficient deployment across many rooms or zones.
• Speed Wing Blind-Mount System Constant-tension fixed-wing mechanism secures the speaker from behind the wall without wall cavity access, accepting thicknesses from 0.1 to 1.5 inches for rapid installation.
• Integrated Backcan Design One-piece sealed ABS glass fiber-reinforced enclosure combines the backcan and driver into a single component, eliminating separate backcan procurement and reducing installation steps.
• Six-Position Transformer Tap Switch Rotary selector provides 25V, 70.7V, and 100V distributed audio tap positions plus direct 8-ohm bypass, supporting virtually every commercial audio system topology from a single unit.
• 5-Inch Square Ultra-Compact Footprint Minimal visible profile integrates cleanly into wall plates and standard architectural surfaces without dominating room aesthetics or requiring large cutouts.
• IP54 Weatherized Construction Full weatherization of all components enables indoor and outdoor-adjacent applications, qualifying the IW31-EZ for covered outdoor corridors, hospitality areas, and semi-exposed installations.
• CE, RoHS, UL1480A, UL2043 Certified Multi-standard certification suite supports deployment in commercial, life-safety paging, and plenum-rated applications across North American and European markets.
• Low-Profile Powder-Coated Aluminum Grille Durable aluminum grille provides a clean, professional appearance that resists damage and accepts paint for custom color matching in high-finish architectural environments.

Typical Applications

• Hotel guestroom corridors, elevator lobbies, and housekeeping areas requiring discreet background music and paging
• Corporate office open-plan areas and private offices with distributed audio zoning
• Retail store fitting rooms, stock areas, and employee break rooms
• Healthcare facilities, hospital corridors, waiting rooms, and patient rooms requiring low-profile audio
• Educational institution hallways, administrative offices, and classroom overflow areas
• Luxury residential multi-room audio installations requiring in-wall speakers with 70V system compatibility
• Transportation hubs, airport gates, and transit station side corridors requiring compact paging speakers
• Hospitality outdoor covered walkways and semi-exposed areas requiring IP54-rated wall speakers

Technical Specifications

Frequently Asked Questions

What does the master pack include, and how many speakers are in the IW31-EZ MP?The IW31-EZ MP master pack contains 8 individual IW31-EZ in-wall speakers. Each unit includes its own conduit clamp, grille, hole template, paint mask, and wire nuts. The master pack SKU is available in both black (IW31-EZ-BK MP) and white (IW31-EZ-WH MP) grille finishes.Can the IW31-EZ be used with a 70V distributed audio system?Yes. The built-in six-position rotary tap switch provides 70.7V tap settings of 10W, along with 25V at 1.3W and 100V at 30W. A direct 8-ohm bypass position is also included. No external transformer is required for any of these operating modes.How is the IW31-EZ installed without access to the wall cavity?The Speed Wing constant-tension blind-mount mechanism deploys automatically when the speaker is inserted into the 4.25-inch square cutout. The wings engage the back of the wall material and apply constant tension as the mounting screws are tightened, securing the speaker without requiring access behind the drywall or panel.Is the IW31-EZ suitable for outdoor or semi-exposed locations?Yes. All IW31-EZ components are fully weatherized and the unit carries an IP54 rating, protecting against dust ingress and water spray from any direction. This qualifies it for covered outdoor corridors, open-air hospitality walkways, parking structure walls, and other semi-exposed environments.What certifications does the IW31-EZ hold for plenum and life-safety applications?The IW31-EZ is certified UL1480A (paging and life-safety speaker applications) and UL2043 (plenum-rated for in-ceiling/in-wall cavities used as return air plenums). CE and RoHS certifications also apply. These listings make it suitable for life-safety paging and voice alarm installations in plenum air-handling spaces.Can the IW31-EZ grille be painted to match wall color?Yes. The aluminum powder-coated grille accepts standard latex paint. The included paint mask protects the driver cone during painting on the wall surface, ensuring a clean, professional finish without speaker damage.What wall thickness range does the Speed Wing mounting system support?The Speed Wing system accommodates wall materials from 0.1 inch (2.5 mm) minimum to 1.5 inches (38.1 mm) maximum thickness. This covers standard drywall, plaster walls, and thin wood paneling without requiring different mounting hardware.Is a pre-construction bracket available for rough-in before drywall installation?Yes. The optional AC-CM31-PCB pre-construction bracket allows contractors to mount the backcan and set wire locations before drywall is installed, simplifying the finish installation phase on new construction projects.