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Definitive Technology® DT Custom Install Series 8" In-Ceiling Round Speaker

Model #: DT 8R
Definitive Technology
At a Glance

Every element of the DT8R is optimized for superior quality and sound. Each part is developed from scratch for a listening experience that delivers and a product that endures. The DT8R is simply the best sounding in-ceiling speaker for multi-room and home theater applications all things considered. Great performance, invisibility and ease of installation are why it endures.

Available in Store Only
$279.00Save $NaN

Get to know this product.

  • Exclusive 8" composite mineral-filled polypropylene driver cones offer superior transparency
  • Annealed aluminum tweeter dome provides great transients and smooth response
  • High definition crossover network with Mylar capacitors delivers the purest high frequencies
  • Improved sound dispersion and off-axis response casts incredible sound throughout the room

Premium Materials for Optimized Audio

DT Series speakers use exclusive composite-filled polypropylene driver cones with rubber surrounds for superior transparency and longevity.

High Definition Crossover

Crossover is crucial to high-end audio quality. The high definition crossover network in DT Series speakers is how each one delivers the purest high frequencies.

Annealed Aluminum

Great transients and smooth response are the direct result of the perfect rigidity and lightness of an acoustically optimized annealed aluminum tweeter dome.

Designed for Superior Sound

Speakers that visually dominate the room distract from the sound. DT Series speakers have whisker-thin micro-perf grilles with slim bezels that can be custom painted to blend in.



Qty Included1
Depth3.81" (9.68 cm)
Grille Dimensions9.75" (24.77 cm) diameter
Cutout Diameter8-3/4" (22.23cm
Recommended Power (Min/Max)10/225w/Ch

Driver Complement

Pivoting Dome Tweeter - Tweeter(1) 1" (2.54 cm) d (Round) Pivoting Dome Tweeter - Tweeter
Mid/Woofer(1) 8" (20.32 cm) d (Round) - Mid/Woofer

In-Ceiling Mount

Dimensions8.75" (22.23 cm) diameter

Audio Quality

Total Frequency Response27 Hz to 30 Hz
Nominal Impedance8 Ohms
Max Sensitivity (1 watt @ 1 meter)89 dB


A/V Receiver Crossover SettingsSmall (60 Hz)


Drivers Warranty5 Years

Shipping Cartons

Carton 111.1" (28.19 cm) h x 11.1" (28.19 cm) w x 6.1" (15.49 cm) d - 4.7 lbs (2.13 kg)

Misc. Specs

Impedance8 ohms
Number of Speakers1
Depth (in.)3.81
Height (in.)8.75
WarningProposition 65 Warning for California Residents