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

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 Weight1.9
Frequency Response40Hz - 30kHz
Enclosure MaterialPolystone
Outdoor ApprovedNo
Manufacturer Warranty2 Year
Max Overall Power Output125
Speaker Connector TypeSpring Clips
Input Power Range10-125 Watts
Rms Power Handling125
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