About the Definitive Technology IW Sub Reference

Product highlights:
- passive in-wall subwoofer for an in-wall music or home theater system
- designed for use with Definitive Technology SubAmp 600 Subwoofer Amplifier (sold separately, required for operation)
- 13" active, long-throw woofer
- 13" passive bass radiator
- non-resonant, sealed Medite® MDF enclosure
- frequency response: 14-200 Hz
- impedance: 4 ohms
- mounting hardware and anti-rattle gasket material included
- paintable bezel and grille
- cutout: 14-3/8"W x 25-1/8"H
- weight: 26 lbs.
- warranty: 5 years
- MFR # UCXA
- Item # 735IWREF
What's in the box:
Definitive Technology IW Sub Reference owner's manual
If you need assistance accessing this owner's manual, please give us a call.- In-wall subwoofer
- Grille (attached)
- 4 Long self-adhesive foam gaskets
- 3 Short self-adhesive foam gaskets
- 8 Screws
- Wall-template
- Paint mask
- Owner's Manual
- Online Product Registration card
More details on the Definitive Technology IW Sub Reference

Features & specs
Features | ||
---|---|---|
Quantity in Package | Single | |
Tweeter | --- | |
Aimable Tweeter | No | |
Woofer Composition | Not given | |
Woofer Surround | Not given | |
Connector Type | Spring post | |
Bi-Amp Inputs | No | |
Built-in Back-box | No | |
Moisture Resistance | ||
Indoor (Moisture-resistant) | No | |
Outdoor (Partial Exposure) | No | |
Outdoor (Full Exposure) | No | |
Specs | ||
Tweeter Size | N/A | |
Midrange Size | N/A | |
Woofer Size | 13 | |
Speaker Shape | Rectangle | |
Cutout Width | 14.375 | |
Cutout Height | 25.125 | |
Mounting Depth | 4 | |
Power Range (Watts) | up to 275 | |
Sensitivity | --- | |
Impedance (Ohms) | 4 | |
Frequency Response | 14-200Hz | |
Parts Warranty | 5 Years | |
Labor Warranty | 5 Years |
Product Research
Features
13" Woofer + 13" Bass Radiator: The Definitive Technology IWSub Reference includes a special shallow-depth, long-excursion 13" woofer that is pressure-coupled to an ultra-low 13" bass radiator to produce deep, impactful bass. The 13" woofer and 13" radiator boast a combined bass radiating surface area of over 265 square inches, while is more than an than an 18" woofer, but with greater speed and control for tighter, deeper, more powerful bass.
Note: The IWSub is a passive subwoofer that will require an external subwoofer power amplifier.
Full Enclosed Design: To play bass in the room it's intended for, rather than spilling into adjacent rooms via walls and ceilings, the IWSub Reference is fully enclosed and sealed with dense, acoustically inert, anti-resonant, anti-vibration Medite wood. As a result, you'll hear tight, powerful bass with no distortion or buzzing.
Paintable Grille: The IWSub Reference in-wall subwoofer comes with a detachable, metal-mesh white grille. The grille is paintable, so you can match the paint color of your wall.
Spring-Post Terminals: The IWSub Reference in-wall subwoofer is outfitted with a pair of spring-post speaker terminals which will accept bare wire (up to 12AWG), pin-connectors, and banana plugs (dual or single).
In-Wall Installation: The IWSub Reference subwoofer can be installed in the wall in new construction or existing construction. It requires a rectangular cut-out of 14.375" (w) x 25.125" (h) x 4.0" (d). The IWSub Reference is designed to be located between two vertical studs that are 16" OC (on-center). There needs to be a minium of 1.25" around the inside of the enclosure behind the wall to accommodate the locking arms. There also needs to be a minium of 1" around the enclosure on the outside of the wall to clear its bezel. Tools required for installation include the following -
- Pencil for marking and leveling the location of installation.
- Keyhole saw or utility knife for cutting drywall.
- Level for leveling in-wall subwoofer.
- Screwdriver, preferably powered, with Phillips head bit.
- Power drill with appropriate bit (optional, for starting wall cut).
- Included template & foam gaskets.
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