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Definitive Technology A90

Dolby Atmos® enabled speaker modules for compatible Definitive Technology powered tower speakers

20 Reviews | 1 question - 6 answers

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Our take on the Definitive Technology A90

If you're looking for an easy way to seamlessly integrate Dolby Atmos surround sound with your Definitive Technology BP-9020, BP-9040, or BP-9060 tower speakers, we have something to show you. When you add these Definitive Technology A90 speaker modules to those towers, you can get some pretty amazing home theater sound. They work with Dolby Atmos soundtracks to add a height dimension to your home theater, for enhanced immersion and spatial effects. 

Take home theater sound higher with Definitive Technology and Dolby Atmos

Definitive Technology A90 Dolby Atmos speaker

The A90s fit on top of Definitive Technology BP-9000 series powered tower speakers (sold separately)  to add Dolby Atmos elevation effects for more immersive surround sound.

If you're looking for an easy way to seamlessly integrate Dolby Atmos surround sound with your Definitive Technology BP-9020, BP-9040, or BP-9060 tower speakers, we have something to show you. When you add these Definitive Technology A90 speaker modules to those towers, you can get some pretty amazing home theater sound. They work with Dolby Atmos soundtracks to add a height dimension to your home theater, for enhanced immersion and spatial effects. 

Bounce sound off the ceiling for enhanced surround effects

How do these speakers work? Each module features Definitive's superb 4-1/2" mid/bass driver and 1" aluminum dome tweeter on the top of the speaker. These drivers are angled and feature controlled dispersion, so they can reflect sound off of your ceiling and back down to your listening positions. The A90 speakers attach to the top of the towers. Use a pair of A90s with your front towers, or add another pair to a set of rear surround towers for an even more enveloping experience.

Custom-built for the BP-9000 series powered towers

The A90 speaker modules are a snap to install. Just remove the brushed aluminum cap on top of each tower speaker, and line up the speaker connector plug on the bottom of each A90 with the connector port on top of the tower. Gently push the A90s down, and you're ready for an intense home theater experience. The A90's hidden integrated connector port terminates at the base of the tower speaker with a pair of binding post speaker terminals for connection to your Dolby Atmos compatible receiver's "Height" or "Top" outputs.

Don't have a Dolby Atmos capable receiver? Check out our selection.

Product Highlights:

  • Dolby Atmos enabled speaker modules
  • designed for use with the Definitive Technology BP-9020, BP-9040, and BP-9060 tower speakers
    • A90 speakers attach to the top of the towers
    • built-in speaker connector terminals mate with terminals on matching tower speakers
  • Dollby Atmos Certified, DTS:X™ compatible
  • 1" annealed aluminum dome tweeter
  • 4-1/2" Balanced Dual Surround System (BDSS) mid/bass driver per speaker
  • drivers are angled up to reflect sound off the ceiling for overhead effects
  • acoustic suspension (sealed) enclosure
  • frequency response: 86-40,000 Hz
  • sensitivity: 89.5 dB
  • recommended amplifier power: 25-100 watts
  • impedance: compatible with 8-ohm outputs
  • 6"W x 4"H x 11"D
  • warranty: 5 years
  • Our 60-day money-back guarantee

What's in the Box:

  • Dolby Atmos enabled loudspeaker modules
  • Owner's Manual
  • "What Obsession Sounds Like" card

Featured Video

These speakers top a pair of 9060's. Extremely happy with them. Great sound.

Barry, Astoria, OR


Definitive Technology A90 Reviews

Average Customer Review(s):

(20 Reviews)

Rock the house

Crutchfield customer from Tucson, AZ on 12/30/2018

Crutchfield Customer Review (What's this?)

Make movie experience great. Fit right on top of speakers. Make alltop surround - surround!

Pros: If you have difinity speaker add these for front dobie.

Cons: Non

Great addition to the 9060's.

Barry from Astoria, OR on 12/15/2018

Crutchfield Customer Review (What's this?)

These speakers top a pair of 9060's. Extremely happy with them. Great sound.

Pros: Love these speakers with my 9060's. Great sound. You won't be disappointed in my humble opinion. Thank you Crutchfield customer service for your input when choosing the Definitive Technology speakers, very happy customer.

Cons: None

Definitive Technology A90

John from Port Orchard, WA on 11/11/2018

Crutchfield Customer Review (What's this?)

Excellent product. They round out my 9060 towers nicely. Worth the money

Pros: An affordable way to enjoy atmos or Dts x coding

Cons: None

Great Value

Crutchfield customer from Bowie, MD on 10/22/2018

Crutchfield Customer Review (What's this?)

Sounds Great adds a new dimension to audio music as well as dynamic movie sound!!

Pros: Sounds great and look great Music sounds good with these Got them at a fantastic price and they look so cool.

Cons: none

Definitive Technology A90

Crutchfield customer from Leesburg, FL on 9/2/2018

Crutchfield Customer Review (What's this?)

The A90's are designed to fit neatly on top of my Definitive front tower speakers, so it was a natural choice. Only problem is I had to upgrade my receiver/amplifier to a 7.1 amp with Dolby Atmos because my recently purchased 5.1 does not support that technology. I tried winging it by paralleling the speaker wiring hookup off of my front speakers but finally said nahhh. Gotta do it right...."ORDERING" ! The new amp arrives tomorrow



Unexpected sound

Michael from Hannacroix, NY on 8/31/2018

Crutchfield Customer Review (What's this?)

Unexpected sound, made the system

Pros: Easy hookup


Must have with BP9000 Series

ChrisM from Mckinney, TX on 6/29/2018

Crutchfield Customer Review (What's this?)

Love the A90! Great addition to my BP9060. Very clear and detailed sound.

Pros: Easy install Detailed sound

Cons: None so far.

Clean looking height surrrounds for BP 9000 series towers.

Scott from Johnson City, TN on 6/24/2018

Crutchfield Customer Review (What's this?)

Clean looking way to add height surround. Sound not as noticeable as I though would be, but also haven't played anything recorded with Atmos yet.

Pros: Clean look, same premium materials and attention to detail as BP 9000 towers,

Cons: Price, adds more physical height to towers

Definitive Technology A90

Crutchfield customer from Hudson, OH on 2/14/2018

Crutchfield Customer Review (What's this?)

Outstanding sound dispertion, crisp, clear, void filling, not to mention, they look kick-ass !!

Pros: Excellent sound, nice design, ease of installation

Cons: Notta

Full Soundscape

Anthony from Clarksville, OH on 1/7/2018

Crutchfield Customer Review (What's this?)

Full sound, clear and bright, mounted on BP 9060, fills large space with great detail.

Pros: Detailed sound ease of installation

Cons: Not fully directional in relation to mount on speaker

Great Sounding

Joyce from N Little Rock, AR on 12/28/2017

Crutchfield Customer Review (What's this?)

We added these speakers to our 9040 towers. With surround, these modules light up. They made the sound come alive especially on movies with Atmos. We heard sounds that we hadn't heard before in old movies. Totally adds the missing element for the Def Tech towers.

Pros: looks good on top of towers, great sound


Definitive Technology A90

Crutchfield customer from Pleasanton, CA on 12/25/2017

Crutchfield Customer Review (What's this?)

These speakers add in a small but noticeable way to the overall immersive sound produced by Definitive Technology BP9060 towers, a CS9060 center speaker and a pair of 9040 surround speakers with respect to music via Dolby Sorround. For the few movies/shows with Atmos, the contribution of the A90's is greater and indeed adds an overhead presence that is more noticeable and pleasant.



Atmos must have

David from Sodus, NY on 12/23/2017

Crutchfield Customer Review (What's this?)

These speakers add a whole new level to your home theater system, I replaced some low level atmos speakers with the A90s and could not be happier with my decision. Plus a couple weeks after purchasing these speaker, Crutchfield had these on sale and they refunded me the difference the same day I asked.

Pros: discrete, easy integration into system.

Cons: None

Definitive Technology A90

Hassan from Riverview, FL on 12/7/2017

Crutchfield Customer Review (What's this?)

It's a great product. Having the Dolby Atmos over the Floor-standing speakers. I'm adding in-ceiling speakers to add more fun



Definitive Technology A90

Crutchfield customer from Little River, SC on 10/17/2017

Crutchfield Customer Review (What's this?)

Great speakers, these Dolby Atmos units are the perfect final piece for the Definitive Tech. speakers. The surround sound on videos is super. You hear the sounds bouncing off the ceiling, witch completes the experience.



Definitive Technology A90

Crutchfield customer from Oak Lawn, IL on 1/28/2017

Crutchfield Customer Review (What's this?)

These little beauties complete the surround sound while watching movies. These speakers fill the room and makes you feel like you are in the middle of the action.



Great Addition to support Atmos

Tom from Alexandria, KY on 1/26/2017

Crutchfield Customer Review (What's this?)

The best part about these speakers is that they drop right into the BP 9000 series speakers. I have the BP9060 for fronts and BP9040 for the rear so it was easy to drop four of these right into the top of the speakers to be Atmos compliant. Since they are more of a background speaker its hard to say if the overall speaker quality is better than the competition but because they are matched for the other Def Tech towers I believe they are the best solution for anyone using Def Techs. Since Def Tech pre-wires the towers you dont have to have wires climbing up the back of the tower to reach these. When you mount them they plug into the tower and down at the bottom are the binding post for these height speakers. Well thought out by Def Tech.

Pros: Nice looking, they match the BP series towers Easy to install without having to run cables up the tower when connecting to Def Tech towers.

Cons: None so far.

Terrific Atmos!

Crutchfield customer from Wichita, KS on 1/18/2017

Crutchfield Customer Review (What's this?)

This Atmos speakers sound amazing. I have a low ceiling (about 7.5'). The height channels did the trick. I played Sicario and you can hear the sound coming from the ceiling. Definitive "definitely" scored a big one.

Pros: Sound great, look amazing!

Cons: None

Solid purchase

Shawn from Boise on 12/8/2016

Crutchfield Customer Review (What's this?)

Tv and movies brought to life. Made a world of difference. Put on xmas list for added surroundings

Pros: Takes up no space. Hidden. Hear those sweet sounds

Cons: Could be louder but may just how movie sends signals but I still playing with systems overall no bad

Best atoms addons !

Anthonyr11 from Norfolk on 9/27/2016

Crutchfield Customer Review (What's this?)

Purchased these from Crutchfield and arrived the next day!! Works perfect with my definitive technology 9060 towers.

Pros: Great atmos and dtx:s effects

Cons: None


Hands-on research

Product Research


Dolby Atmos Elevation Speaker Module: Definitive Technology designed the A90 elevation module as a dedicated height speaker designed specifically for the BP9060, BP9040, and BP9020 models so you can fully enjoy a Dolby Atmos multi-dimensional sound experience within your home theater setup. The A90 easily connects and sits within the top of the BP9000 speaker to fire sound upwards, which is then reflected off the ceiling and back down to your viewing area.

Compatibility: The Definitive Technology A90 Dolby Atmos elevation speaker module seamlessly integrates within the top of the following Definitive Technology BP9000 series tower speakers - BP9020, BP9040, & BP9060 (all sold separately). The A90 adds approximately 3.875" to the overall height of the BP 9000 series tower loudspeakers.

Proprietary, Plug-In Connector: The Definitive Technology A90 is fitted with a proprietary male connector, which plugs into the proprietary female connector on top of the BP9000 series tower speakers. You will also need to run speaker wire from your Dolby Amos AV receiver's "Height" speaker outputs to your BP9000 series tower speaker's "Height" terminal inputs.

Two-Way Driver Design: The Definitive Technology A90 Dolby Atmos elevation speaker module employs a two-way driver design with a 1" aluminum dome tweeter and a 4.5" midrange cone woofer. The speaker's crystal clear highs and detailed midrange bring the most demanding audio to life. Definitive Technology's tweeters play higher in frequency than what is heard by the human ear, creating an authentic reproduction of sound as the artist intends in the studio or concert hall.

Sloped Speaker Baffle: The Definitive Technology A90 Dolby Atmos elevation speaker module utilizes a sloped speaker baffle and exclusive foam construction to provide richness and depth to the sound. The Dolby Atmos elevation speaker module fires sound upwards, reflecting it off the ceiling and back down to your viewing area in a tightly controlled dispersion pattern, damping the sound that remains.

Resonance-Free Cabinet w/ Acoustically Transparent Grille: The Definitive Technology A90 uses a resonance-free cabinet w/ acoustically transparent grille for high performance sound. The speaker cabinet's maximum rigidity with strategically placed bracing improves imaging while reducing resonance, further reinforcing the speaker's clean and powerful sound. Thanks to the speaker's acoustically transparent grille, you'll enjoy the subtle elegance of the speaker design without having to remove a speaker grille to enjoy natural, uncolored sound.

Dolby Atmos: With Dolby Atmos, sound comes alive from all directions, including overhead, to fill the home theater with astonishing clarity, power, detail, and depth. Dolby Atmos is the first home theater system that is based not on channels, but on audio objects. Filmmakers using Dolby Atmos can decide exactly where those sounds should originate and precisely where they move as the scene develops. To deliver the full object-based soundtrack to home theaters, Dolby developed new home authoring tools and new encoding methods that allow all the audio objects created for the cinema to be used in home theater.

What You Need: To experience Dolby Atmos using the Definitive Technology A90 elevation speaker module, you'll also need the following.

  • A minimum of a 5.1ch speaker system with a pair of Definitive Technology BP9000 series tower speakers (BP9020, BP9040, or BP9060).
  • A Dolby Atmos enabled AV receiver or pre-processor.
  • A Blu-ray Disc player, compatible Blu-ray game console, or connected streaming player set to its PCM bit stream output option (must be connected via HDMI).
  • Dolby Atmos encoded source material (Blur-ay disc, game disc, streaming content, etc.)

Installation Notes: To achieve the best Dolby Atmos experience possible, your room's ceiling should meet the following requirements.

  • You ceiling should be flat.
  • Your ceiling material should be acoustically reflective (examples include drywall, plaster, hardwood, or other rigid, non-sound absorbing material).
  • Ideal ceiling height is between 7.5' and 12'.
  • Maximum recommended ceiling height is 14'.

BP9000 Series: The A90 is part of Definitive Technology's BP900 series line-up of loudspeakers. Definitive Technology's BP9000 series loudspeakers is its 4th generation of bipolar tower speakers, matching center channels, surrounds, and a height speaker module, designed to offer true, full-range performance for listeners seeking the highest quality audio reproduction. The BP9000 series of loudspeakers consists of the BP9020, BP9040, BP9060 and BP9080X bipolar tower speakers; the CS9040, CS9060 and CS9080 center-channel speakers; the SR9040 and SR9080 surround speakers; and the A90 elevation speaker module supporting Dolby Atmos.


Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

have BP 9040 ~for 5.1 surround home theater [ Crane  Jan 16, 2019 ]
i already own a pair of bp9040's and these will make a great addition to my system! [ Toby  Jan 04, 2019 ]
I have a pair of 9000 series towers and these plug right in [ john  Oct 28, 2018 ]
Good quality [ Christopher  Jun 15, 2018 ]
Want the height speakers but not the larger power of the BP9080X [ joseph  Jun 07, 2018 ]
For Dolby ATMOS without cutting up the ceiling they are the way to go [ Robert  Mar 09, 2018 ]
upgrade for my current speakers [ Harold  Oct 23, 2017 ]
I have the Def.Tech. BP9020. [ John  Oct 04, 2017 ]
Definitive Technology speakers Rock! Most cool speakers sound great [ brian  Sep 06, 2017 ]
I bought these to experience Dolby Atmos with my new speakers. [ DAUPHINE  Feb 10, 2017 ]
My front left BP-20 blew and I needed a replacement as my entire home theater speaker array is Definitive Technology. [ Michael  Feb 05, 2017 ]
Wanted the extra 3d sound these deliver. [ Luis  Jan 02, 2017 ]

1 question already asked

Sorry, can't help with this one. [ John  Jun 21, 2018 ]
I don't think it will fit. These speakers if I'm not mistaken is for the BP9000 series only [ JORGE E  Jun 21, 2018 ]
I really don't know [ Alberto  Jun 21, 2018 ]
No, they are designed for the Def Tech 90xx series. [ Richard  Jun 21, 2018 ]
No these are specifically made to fit the 9000"s towers and the connecters are on the towers [ RUAL V  Jun 21, 2018 ]
No, they will not. These are designed to fit on top of the Definitive BP-9020, BP-9040 and BP-9040. [ Luis  Jun 21, 2018 ]

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