Contact us
Close contact box
Connect ID #
514 261 847 3
Connect ID #
514 261 847 3
All finished with your chat session?

We’ll email you a transcript of this conversation for your records.

All of our representatives are
currently chatting with other customers.

Please enter your name.  
Please enter a valid email address. Why is this required?
Please enter your US phone number.  

For Tech Support, call 1-888-292-2575

Thank you, !
Our conversation will be emailed to
Chat Advisor Image

Your Advisor,

More about me
Please enter a question  
Don't wait on hold. We'll call you back when it's your turn to talk with the next available .
Please enter your name  
Please enter your phone number  

Please enter a message  

Calls may be recorded for training and quality control purposes.

We are located in Virginia USA.

Definitive Technology DT8R

In-ceiling speaker

Item # 735DT8R

Definitive Technology's DT8R in-ceiling speaker offers high-quality sound with a nearly invisible design.

Definitive Technology's DT8R in-ceiling speaker offers high-quality sound with a nearly invisible design.

Need help?
Contact our Virginia-based experts.

Item # 735DT8R

Ships free

Temporarily out of stock

$279.00 -$53.71 Outlet savings

$225.29 each

Other options

Need help?
Contact our Virginia-based experts.

About the Definitive Technology DT8R

Full-range overhead sound

Definitive Technology's DT8R in-ceiling speaker offers high-quality sound with a nearly invisible design. Put a pair in rooms where you want dynamic music without taking up any floor space, or as your home theater's surround or overhead channels. 

Full-range overhead sound

Definitive Technology's DT8R in-ceiling speaker offers high-quality sound with a nearly invisible design. Put a pair in rooms where you want dynamic music without taking up any floor space, or as your home theater's surround or overhead channels. 

You'll enjoy solid bass from the 8" polypropylene woofer, and smooth highs from the 1" aluminum dome tweeter.

DIY installation

If this is a do-it-yourself install, check out my guide to installing in-ceiling speakers, along with our selection of in-wall speaker wire. You can paint the included magnetic grille to have your speaker blend in with your décor.


Product highlights:

  • ideal for an in-ceiling music system or overhead surround effects in a home theater system
  • 1" aluminum dome tweeter
    • tweeter is aimable to direct high-frequency details towards you
  • 8" mineral-filled polypropylene woofer
  • frequency response: 27-30,000 Hz (±3 dB)
  • recommended amplifier power: 15-100 watts
  • sensitivity: 89 dB
  • impedance: 8 ohms
  • ultra-thin bezel and paintable magnetic grille provide seamless integration into your décor
  • speaker cutout diameter: 8-3/4"
  • overall diameter: 9-3/4"
  • mounting depth: 3-13/16"
  • warranty: 5 years
  • Our 60-day money-back guarantee
  • MFR # UGDD

What's in the box:

  • In-ceiling loudspeaker
  • Grille
  • Mounting template
  • Carboard paint shield
  • Owner's Guide
  • Online Product Registration Information
  • Important Installation Instructions

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

See the difference between "Open Box" and "Scratch & Dent" Outlet items

Customer reviews

Loading reviews...

Definitive Technology DT8R reviews

Average review:

5 reviews

Thanks for submitting your review

Filter by rating

Customer photos

Sort reviews

Sort by:
Items per page:
View page:

Verified customer (What's this?)
Verified employee purchase (What's this?)



Crutchfield response

<< >>

More details on the Definitive Technology DT8R

Stacey B.

Features & specs

Quantity in Package Single
Tweeter Hard-Dome
Aimable Tweeter Yes
Woofer Composition Polypropylene
Woofer Surround Rubber
Moisture-resistant No
Outdoor-rated No
Connector Type Spring post
Bi-Amp Inputs No
Built-in Back-box No
Tweeter Size 1
Midrange Size N/A
Speaker Shape Round
Woofer Size 8
Cutout Width 8.75
Cutout Height 8.75
Power Range (Watts) 10-100
Sensitivity 89 dB
Impedance (Ohms) 8
Frequency Response 27-30kHz
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research


DT Custom Install Series: The DT Custom Install Series by Definitive Technology is purpose-built for multiroom and home theater applications where great performance, minimized visibility and ease of installation elevates the experience. The DT Custom Install Series offers exceptional sonic performance from speakers that seemingly disappear into a wall or ceiling. Definitive Technology speakers are designed to immerse you in sound. Every element is optimized for superior quality, and each part is developed from scratch for audio that delivers and products that endure.

1" Annealed Aluminum Dome Tweeter: The 1" ceramic-coated annealed aluminum dome tweeter is lightweight, yet rigid and has been acoustically optimized to reveal even the most delicate detail in recordings. The tweeter has a low-diffraction swivel mount that helps improve dispersion, as well as overall midrange and off-axis response. The aimable tweeter allows you to focus the sound toward or away from your listening area, depending on the application.

  • When using DT Series speakers as fronts in a home theater setup or as stereo speakers in a distributed audio system, aim the tweeter toward the main listening position.
  • As rear or surround speakers, aim the tweeter toward the nearest reflecting surface (an adjacent wall or ceiling) for a more diffuse soundfield; for more direct sound, aim the tweeters at your listening position.

8" Composite Mineral-Filled Polypropylene Woofer: The exclusive 8" composite mineral-filled polypropylene driver cone with rubber surround produces a clear and natural sound, as well a provides durability and longevity.

High Definition Crossover Network: The high definition crossover network utilizes mylar capacitors that deliver a smooth transition between the tweeter and woofer for purest high and midrange frequencies.

Low-Profile Magnetic Grille: The DT Custom Install Series in-ceiling loudspeaker includes a low-profile grille with a slim bezel that uses neodymium magnetics for fast and tight attachment. The grille can be custom painted to match your decor. The grille measures 9.75" in diameter and only protrudes 0.1875" from the mounting surface.

Spring-Post Terminals: The DT Custom Install Series in-ceiling speaker is outfitted with spring-post terminals to connect bare wire (18AWG-12AWG), pin-connectors, or banana plugs (single only).

In-Ceiling Installation: The DT8R mounts in a ceiling (1/2" drywall is recommended) and requires a round 8.75" cutout and a mounting depth of 3.875". The speaker is secured to the ceiling using the four integrated mounting clamps (make sure to not over-tighten the mounting clamp screws). The cutout should be at least 2" from adjoining walls or ceiling, internal studs or plumbing to prevent interference with the mounting clamps. It is recommended to place the speaker at least 2" from side walls for optimal sound dispersion.

Loading accessories...

Customer Q&A

2 questions already asked

Will these work as rear surround speakers with Bose accoustimass 10 system? My other front and centers are all Bose
[ Bobby  May 05, 2021 ]
2 answers
The answer is yes, they are 8 ohm speakers, therefore, they will work.
[ ALBERTO  May 05, 2021 ]
It is highly recommended you don't mix speaker brands beside the sub. Either get Bose in ceiling if they make them or replace your fronts with Def Tech also.
[ ANDREW  May 05, 2021 ]
I'd like to install these in a covered outdoor patio. I live in Dallas Texas with hot summers, humidity and mild winters 25-40 degrees. Any concerns?
[ Carl  Jul 25, 2019 ]
1 answer
Those speakers are not rated for environments with moisture like that. I would recommend instead the Focal ICW 8 which have similar specs and materials but are moisture-rated for outdoor use:
[ Cosmo  Aug 04, 2019 ]  Staff

Loading articles...