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Definitive Technology IW Sub Reference Passive in-wall subwoofer

Item # 735IWREF

The IWSub Reference delivers deep, hard-hitting bass without eating up the space in your room.

The IWSub Reference delivers deep, hard-hitting bass without eating up the space in your room.

Item # 735IWREF

Every order includes

  • Free lifetime tech support
  • 60-day price-drop protection
  • 60-day returns
In stock
$1,499.00 each

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About the Definitive Technology IW Sub Reference

Colin M.

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

Separate amplifier required.

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

Stacey B.

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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Customer Q&A

1 question already asked

Q
Can this sub be installed in the ceiling?
mike  Jan 22, 2025
1 answer
A
Greetings Mike. Thank you for your question. The Definitive Technologies IW Sub Reference is recommended for both in wall, and in ceiling installs.
thomas  Jan 22, 2025 (Staff)

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