Definitive Technology A90 Dolby Atmos Add-On Speaker Modules

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



Lower 48 U.S. States


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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

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