Definitive Technology DI4.5R 4.5" 2-Way In-Ceiling Speaker

Powerful performance is practically invisible with the Definitive Technology Disappearing™ Series. Merely 5-3/8” in diameter, the DI 4.5R 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.

  • Flangeless, flush mount design and micro-perf grille allow 5-3/8″ 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


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Lower 48 U.S. States


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Tweeter Diameter 3/4″
Type  Pivoting Pure Aluminum Dome
Mid / Woofer Diameter 4 1/2″
Type  BDSS Midrange Driver
Tweeter/Mid Array Direct Radiating 2 Way Coaxial
Maximum Sensitivity 1 watt @ 1 Meter 88 dB
Total Frequency Response Overall 35 Hz – 30 kHz
Nominal Impedance Compatible with 8 ohm
Crossover A/V Receiver Crossover Setting Small (120 Hz)
Power Handling  10 – 155 watts per channel
Cut Out Dimensions Diameter 4-1/2″
Mounting Depth  3-3/8″
Grille Dimensions Diameter 5-3/8″

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