skip to Main Content

Definitive Technologies DI 4.5R in-ceiling Speaker

$349.00 inc. GST

  • Flangeless, flush mount design and micro-perf grilles allow 5.38” 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. Combining a 5.3” visible diameter and 4.5” mid/woofer that effortlessly outperforms larger traditional speakers, the DI 4.5R easily installs into your ceiling to envelop any space in dynamic, high definition audio. With this over-achieving, flush mount loudspeaker, you’ll hear fantastic sound in every corner of the room, but you won’t see a thing.

Designed for Invisibility

With a minimal visible surface area, hidden flange architecture and micro-perf grille, the DI 4.5R disappears into any environment, without the need for custom sheetrock or spackle work.

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.

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 4.5″ (11.43 cm) d (Round) BDSS Bass/Mid – Mid/Woofer
Depth: 8.59 cm
Weight: 1.18 kg
Grille Dimensions: 13.67 cm diameter
Shape: Round
Dimensions: 4.5″ (11.43 cm) diameter
Clearance Required for Mounting Dogs (add to each side of cutout): 0.88″ (2.24 cm)
Speaker Inputs(1) Pair of Heavy Duty, Spring Loaded – na
Total Frequency Response: 35 Hz → 30 Hz
Nominal Impedance: 8 ohms
Max Sensitivity (1 watt @ 1 meter): 89 dB
A/V Receiver Crossover Settings: Small (100 Hz)

Back To Top