skip to Main Content

Definitive Technologies DI 3.5R in-ceiling Speaker

$329.00 inc. GST

  • 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



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.

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.


Driver Complement
1x 0.75″ (1.91 cm) d (Round) Pivoting Dome Tweeter
1x 3.5″ (8.89 cm) d (Round) BDSS Bass/Mid – Mid/Woofer
Depth: 7.62 cm
Weight: 0.86 kg
Grille Dimensions: 11.58 cm diameter
Shape: Round
Dimensions: 9.53 cm diameter
Clearance Required for Mounting Dogs (add to each side of cutout): 2.24 cm
Total Frequency Response: 40 Hz → 30 Hz
Nominal Impedance: 8 ohms
Max Sensitivity (1 watt @ 1 meter): 89 dB
A/V Receiver Crossover Settings: Small (100 Hz)
Speaker Inputs(1) Pair of Heavy Duty, Spring Loaded – na

Back To Top