Definitive Technology DT8R DT Series Round 8" In-Ceiling Speaker 
Every element of the DT8R is optimized for superlative quality and sound. Each part is built from scratch for an audio experience that packs a punch and a robust product that endures. The DT8R is the best-in-class sounding in-ceiling speaker for multi-room and home theatre applications all things considered. Stellar performance, invisibility and effortless installation are why it endures.
About this item
Premium materials - every choice optimized for its intended use
The disappearing grille really disappears
Accessories extend the utility
Mix and match with the di Series
Features:
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 utilize exclusive composite-filled polypropylene driver cones with rubber surrounds for superlative transparency and unmatched longevity.
Annealed Aluminum
Great transients and smooth response is the direct outcome of the remarkable rigidity and lightness of an acoustically optimized annealed aluminium tweeter dome.
High Definition Crossover
Crossover is consequential to top-of-the-line audio quality. The high definition crossover network in DT Series speakers is how each one delivers the purest high frequencies.
Specifications of Definitive Technology DT8R DT Series Round 8" In-Ceiling Speaker:
Brand & Model #
Definitive Technology DT8R
Driver Complement
(1)  1" (2.54 cm) d (Round) Pivoting Dome Tweeter - Tweeter
(1)  8" (20.32 cm) d (Round) - Mid/Woofer
Shape
Round
Crossover 
A/V Receiver Crossover Settings: Small (60 Hz)
Speaker Inputs
(1) Pair of Heavy Duty, Spring Loaded - na
Audio Quality
Total Frequency Response: 27 Hz → 30 Hz
Nominal Impedance: 8 ohms
Max Sensitivity (1 watt @ 1 meter): 89 dB
Dimensions
8.75" (22.23 cm) diameter
Depth
3.81" (9.68 cm)
Grille Dimensions
9.75" (24.77 cm) diameter