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Definitive Technology® IW Sub Reference™ Ultra High-Performance 13" White In-Wall Subwoofer

Model #: IW Sub Reference
Definitive Technology
At a Glance
The IWSub Reference is a completely self-enclosed in-wall subwoofer for use in whole house distributed music or stealth home theater installations. It's a deep bass powerhouse that will disappear in your room. It has a non-resonant sealed medite (a dense wood product) enclosure and a paintable bezel and grille.
Available in Store Only
$1,499.00Save $NaN

Get to know this product.

IW Sub Reference Fully-Enclosed In-Wall Subwoofer

Inside the completely self-enclosed in-wall sub is the technical brainpower derived from Definitive's award winning SuperCube free-standing subwoofers. It includes a special shallow-depth, long excursion active 13" driver pressure-coupled to a 13" Ultra Low Bass radiator for a total bass radiating surface area of over 265 square inches—more than an 18-inch woofer but with greater speed and control. Combined, these features result in tight musical excellence.

  • Enjoy deep high impact bass without using any floor-space
  • Fits in standard new or existing wall construction - fully enclosed design ensures perfect results in any wall
  • One 13 inch active subwoofer driver pressure coupled to one 13 inch Ultra Low Bass radiator
  • Use with Definitive SubAmp 600 only (sold and packaged separately)
  • Available Finishes: White
Useful Documents


Sold AsEach
Grille Dimensions26.19" (66.52 cm) h x 15.5" (39.37 cm) w
Shipping Cartons30" (76.2 cm) h x 19.5" (49.53 cm) w x 10.5" (26.67 cm) d
Shipping Weight45 lbs (20.41 kg)

Driver Complement

Subwoofer1) 13" (33.02 cm) d (Round)
Bass Radiator(1) 13" (33.02 cm) d (Round)

In-Wall Mount

Available OrientationsVertical
Dimensions25.13" (63.83 cm) h x 14.38" (36.53 cm) w

Audio Quality

Total Frequency Response14 Hz to 200 Hz
Nominal Impedance4 ohms


Speaker Inputs(1) Pair of Heavy Duty, Spring Loaded - na


Cabinet Warranty5 Years
Drivers Warranty5 Years
Original Purchaser OnlyYes


Required Accessories(1) SubAmp 600

Included Accessories

Wall Mounting Template1
Paint Mask1
Paintable Grille1
Self Adhering Foam Gasket1

Misc. Specs

Width (in.)15.50
Height (in.)26.19
Woofer Size13
Speaker TypePowered Subwoofers
Color Finish NameWhite
Speaker Size13
Subwoofer Size13
WarningProposition 65 Warning for California Residents