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Definitive Technology In Walls

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Definitive Technology DI 4.5R Round In-Wall/In-Ceiling Speaker- White

Model #: DI 4.5R


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Definitive's Disappearing In-Wall series speakers feature near-invisibility thanks to their small diameters, hidden flange design, and low profile micro-perf grilles. They are as easy to install as traditional flanged flush-mount speakers, and don't require custom sheetrock/spackle skills to install yet they are practically invisible. The DI 4.5R is a mere 5-3/8" (13.55 cm) in diameter, about the same size as the mini recessed lighting fixtures that are all the rage in lighting design today. Definitive's exclusive Balanced Dual Surround System (BDSS) driver technology permits these new flush mount speakers to deliver more bass output and dynamic range than larger drivers. For example, the DI 4.5R's 4-1/2" driver has the output, bass and dynamics of a 5-1/4" traditional speaker.


Flangeless design & micro-perf grille minimize visibility.
Simple to install no spackle work required.
8-5/16" (21.04 cm)total visible diameter is about the same size as competing 5-1/4" models.
Perfect for use as side/rear surround speakers for Mythos and BiPolar-based home theater systems.
Latest generation BDSS drivers for audiophile-grade sound quality.
Pivoting Pure Aluminum dome tweeters.
Axially Aligned design ensures broad, balanced coverage area.
GaussGrip magnetic grille fasteners.
Adjustable high-definition crossover.
Optional fire-rated enclosures.
Cast PolyStone baskets for rigidity without "ringing".


Driver Complement
Quantity 1
Diameter 3/4" (1.91cm)
Type Pivoting aluminum dome; Axially aligned
Mid / Woofer
Quantity 1
Diameter 4 1/2" (11.43cm)
Type BDSS Midrange Driver
Tweeter/Mid Array
Type Direct Radiating 2 Way Coaxial
Audio Inputs
Speaker Level 1 Pair (Heavy Duty Spring Loaded)
Maximum Sensitivity
1 watt @ 1 Meter 88 dB
Total Frequency Response
Overall 35 Hz - 30 kHz
Nominal Impedance
Compatible with 8 ohm
A/V Receiver Crossover Setting Small (100 Hz)
Power Handling 10 - 150 watts per channel
Cut Out Dimensions
Diameter 4 1/2" (11.43cm)
Mounting Depth 3 3/8" (8.57cm)
Internal Clearance Required for Mounting Dogs (add to each side of Cut Out) 7/8" (2.22cm)
Grille Dimensions
Diameter 5 3/8" (13.65cm)
Orientation In Wall or In Ceiling
Cabinet Type
Speaker Enclosure Infinite Baffle
Product Weight
Out of Box 2.6 lbs
Included Accessories Wall Template; Paintable Magnetic Grill
Optional Accessories Rough-In-Kit; Fire Can (Both Available Separately)
Carton Size
Height 6 1/8" (15.56cm)
Width 8 7/16" (21.43cm)
Depth 7 9/16" (19.21cm)
Shipping Weight
One per Carton 4 lbs
Drivers and Cabinet
Parts and Labor 5

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