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Category: In-Ceiling

Definitive Technology DI 4.5R Disappering Series 4.5'' In-Ceiling Speaker (Each)

Key Features

  • Architectural in-ceiling speaker from the Disappearing Series designed for discreet, built-in audio

  • 5.5-inch woofer driver delivers clear midrange and balanced bass in a compact form

  • Dedicated high-frequency driver for crisp and detailed treble reproduction

  • Smooth, well-engineered crossover ensures coherent sound across frequencies

  • Flush-mount, paint-ready grille allows the speaker to blend seamlessly into the ceiling

  • Rigid, acoustically optimized baffle and frame design reduces resonance and distortion

  • Wide dispersion pattern for even sound coverage throughout the room

  • Ideal for surround channels, height channels (e.g., Dolby Atmos effects), or whole-home audio installations

  • Compatible with a variety of AV receivers and amplifiers

  • Built for long-term reliability with refined clarity and immersive performance

  • Excellent choice for home theatre systems and multi-room audio environments that value both invisible installation and premium sound quality

Description

Definitive Technology DI 4.5R Disappering Series 4.5” In-Ceiling Speaker

DI 4.5R

Disappearing™ Series Round 4.5” In-Wall / In-Ceiling Loudspeaker

  • 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

IN-CEILING SOUND THAT COVERS MORE GROUND

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.

 

Specifications

OVERALL

Total Pieces: 1

ACCESSORIES

Included Accessories
(1) Wall Mounting Template

Shipping Cartons

Carton 1: 6.13″ (15.57 cm) h x 8.44″ (21.44 cm) w x 7.56″ (19.2 cm) d – 4 lbs (1.81 kg)

In-Ceiling Speaker

Qty Included: 1
Driver Complement
(1) 0.75″ (1.91 cm) d (Round) Pivoting Dome Tweeter – Tweeter
(1) 4.5″ (11.43 cm) d (Round) BDSS Bass/Mid – Mid/Woofer
Depth: 3.38″ (8.59 cm)
Weight: 2.6 lbs (1.18 kg)
Grille Dimensions: 5.38″ (13.67 cm) diameter

In Ceiling Mount

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)

In-Wall Mount

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)

Inputs

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

Audio Quality

Total Frequency Response: 35 Hz ? 30 Hz
Nominal Impedance: 8 ohms
Max Sensitivity (1 watt @ 1 meter): 89 dB
Crossover: A/V Receiver Crossover Settings: Small (100 Hz)

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