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Definitive Technology® Disappearing™ Series Round 3.5” White In-Wall / In-Ceiling Speaker

Model #: DI 3.5R
Definitive Technology
At a Glance
Powerful performance is practically invisible with the Definitive Technology Disappearing™ Series. Merely 4.56” in diameter, the DI 3.5R is about the same size as most of today’s mini recessed lighting fixtures. Sleek, easy-to-install and designed to vanish into any décor, this impressive little loudspeaker produces full-bodied sound that’s immersive but never intrusive.
Available in Store Only
$229.00Save $NaN

Get to know this product.

DI 3.5R Disappearing™ Series Round 3.5” In-Wall / In-Ceiling Speaker

  • White Finish
  • Flangeless, flush mount design and micro-perf grille allow 4.5" of visibility to match mini recessed lighting fixtures
  • Deeper sound quality with precision BDSS™ drivers and a pivoting pure aluminum dome tweeter
  • Rigid PolyStone™ baskets eliminate unwanted vibrations to prevent ringing and minimize distortion
  • Axially aligned design provides broader sound dispersion and more natural balance

Balanced Double Surround System

Proprietary BDSS™ technology delivers the wide dynamic range and deep bass output of much larger drivers in a small-sized, high-efficiency mid/woofer.

Pure Aluminum Tweeter

The pivoting pure aluminum dome tweeter features a uniquely constructed housing, eliminating diffraction distortions typical with traditional speakers for spectacular audio performance.

Adjustable Crossover

A sophisticated adjustable crossover network with custom, high-precision components produces superior sonic purity for crisp, clean sound.

Balanced Dispersion

BDSS™ technology, aim-ready tweeters and a specially-contoured AeroRing™ around the driver distributes natural, well-balanced sound everywhere in the room.



Sold AsEach
Depth3" (7.62 cm)
Weight1.9 lbs (0.86 kg)
Grille Dimensions4.56" (11.58 cm) diameter
Shipping Carton5.88" (14.94 cm) h x 7.06" (17.93 cm) w x 6.88" (17.48 cm) d - 3 lbs (1.36 kg)

Driver Complement

Pivoting Dome Tweeter - Tweeter(1) 0.75" (1.91 cm) d (Round) Pivoting Dome Tweeter - Tweeter
BDSS Bass/Mid - Mid/Woofer(1) 3.5" (8.89 cm) d (Round) BDSS Bass/Mid - Mid/Woofer

In-Wall Mount

Dimensions3.75" (9.53 cm) diameter
Clearnace Required for Mounting Dogs (add to each side of cutout)0.88" (2.24 cm)

In-Ceiling Mount

Dimensions3.75" (9.53 cm) diameter
Clearnace Required for Mounting Dogs (add to each side of cutout)0.88" (2.24 cm)

Audio Quality

Total Frequency Response40 Hz → 30 Hz
Nominal Impedance8 ohms
Max Sensitivity (1 watt @ 1 meter)89 dB


A/V Receiver Crossover SettingsSmall (60 Hz)


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


Cabinet Warranty5 Years
Drivers Warranty5 Years

Included Accessories

Wall Mounting Template1
Paintable Magnetic Grille1

Misc. Specs

Product Weight (lbs.)1.9
Frequency Response40Hz - 30kHz
Enclosure MaterialPolystone
Color Finish NameWhite
Outdoor ApprovedNo
Manufacturer Warranty2 Year
Input Power Range10-125 Watts
Speaker Connector TypeSpring Clips
RMS Power Handling (Watts)125
Impedance8 ohms
Maximum Power Handling (Watts)125
Number of Speakers1
Depth (in.)0.88
Height (in.)3.75
Width (in.)3.75
WarningProposition 65 Warning for California Residents