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Definitive Technology A90 Dolby Atmos Add-On Speaker Modules - Pair



In The Continental US

5-Year Warranty

On All Speakers

No Sales Tax!

SKU A90ATMOS Categories , Brand:
  • For Use with BP9000-Series Speakers
  • 2-Way Speaker Design
  • 4.5″ Midrange Driver | 1″ Aluminum Dome Tweeter
  • 25 to 100W Recommended Amplifier Power

Brand New Products

All items we sell are New and 100% Genuine products!

Price Match Guarantee

We guarantee to match any out-the-door lower price!

Hassle Free Returns

20-Day Returns on all products (Check store policy for more details)


Add height channels to your compatible home theater system with this pair of Definitive Technology A90 Dolby Atmos Add-On Speaker Modules. They’re designed to integrate with your Definitive Technology BP9000-series speakers and produce upward-firing sound effects to comply with Dolby Atmos and DTS:X standards for a more immersive soundstage. They feature a two-way design with a 4.5″ midrange driver and 1″ tweeter and support amps that output 25 to 100W.


  • Tweeter (# per system) N/A
  • Mid-bass (# per system) N/A
  • ATMOS Tweeter 1″ annealed aluminum dome (1)
  • ATMOS Driver 4.5″ BDSS 2nd gen. (1)
  • Active Woofer (# per system) none
  • Bass radiator (# per system) none
  • Driver/Tweeter Array N/A


  • DSP Intelligent Bass Control N/A
  • Nominal power (1% THD, 5 sec.) N/A
  • Operating Class N/A
  • Controls N/A
  • Inputs N/A
  • Binding Posts N/A
  • Front LED Logo N/A


  • Tweeter High Pass 2nd Order
  • Tweeter Crossover Frequency 2.5kHz
  • Driver High Pass Electrical N/A
  • Driver High Pass Acoustic suspension 1st Order
  • Driver Crossover Frequency N/A
  • Subwoofer Low Pass N/A
  • Mylar Capacitors Yes
  • Air Core inductors Yes


  • Monocoque Construction Yes
  • Low Diffraction MDF Enclosure N/A
  • Wall Thickness N/A
  • Built In ATMOS Ready Dock Yes
  • Aerofram die cast aluminum stabilizer base with top adjustable spikes/padded feet N/A
  • Anodized Aluminum Top Cap N/A
  • Die-Cast aluminum end caps N/A


  • Recommended Amplification (wpc) 20-200w
  • Impedance Compatible with 8 ohm outputs
  • Frequency Response 86Hz-40kHz
  • Sensitivity 89.5dB

Built in Elevation Module

  • Speaker Complement 1- 1in Annealed Aluminum tweeter, 1-4.5in BDSS Driver


  • Height (inches) 4
  • Width (inches) 6
  • Depth (inches) 11
  • Base Footprint (inches) N/A


Free Shipping within the Contingent United States can typically take 1-2 full weeks for delivery (or sooner).
Once your product ships out we will ALWAYS email you a tracking number for your convenience to be able to track online.

Air and Ground shipment time frames are business days only, and exclude weekends and/or holidays.
Orders outside the 48 continental States require Second Day or Next Day Air service.


NationwideStereo.com does not assess duties for international orders and they are subsequently subject to applicable customs, import duties and taxes, which are the sole responsibility of the customer. Please contact your local customs office for details.

  • Nationwide Stereo guarantees you the utmost in quality, authenticity, and reputability
  • 20 Day Return Policy*
  • No sales tax charged as we are located out of a non sales tax state
  • 1-5 Year NationwideStereo Hassle Free Replacement Warranty on all items
At Nationwidestereo.com, your complete satisfaction is important to us. If for any reason you are not 100% satisfied with your purchase simply create an RMA under our Contact Us Page & send your item back to Nationwide Stereo in its new, unused condition, with original packaging and we will be happy to provide you with either a partial refund of the purchase price or a store credit toward an exchange (excluding shipping & handling charges). Some conditions may apply. Please read our full return policy.
Our Products:
  • are authentic, never used, in the original box with manuals.
  • have a 1 to 5 year warranty program (see our warranty section for details).
Your comfort, security and confidence are our utmost concern. All transactions are digitally encrypted using the latest technologies. We never share any of your information.

Do the products you sell have a warranty?

Yes all products we sell come with an equivalent to manufacturer warranty for the same time duration as the manufacturer would supply you with.  If you ever experience an issue with your item purchased from us, you will simply have to contact us for repair or replacement on your product within the warranty time period*


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