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Definitive Technology DYMENSION DM90 Integrated Height Module for Dymension DM80 and DM70 Speakers (Pair)

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Dymension | DM90
The Dymension™ DM90 integrated height module attaches to Dymension DM80 and DM70 bipolar tower speakers to provide upward-firing drivers that make the towers Dolby Atmos-enabled. With DM90s attached to DM80 or DM70 speakers, you can create the Dolby Atmos-enabled and DTS:X speaker system of your dreams.


Purpose-Built Add-On Modules
An upward-firing mid/bass woofer and tweeter project sound toward the ceiling where it reflects back to you, providing a sense of height that translates to a more immersive listening experience.

Plug-and-Play Integration
DM90 connects easily to Dymension™ DM80 or DM70 bipolar tower speakers. The speakers and the height module feature a snap-in connection system that makes electrical connections and secures the height module to the top of the speaker.

BDSS System and Linear Response Waveguide
DM90’s 5.25” mid/bass woofer features our patented Balanced Double Surround System™ technology. BDSS improves midrange driver excursion and provides a wide, uniform soundstage with seamless mid/bass integration. A Linear Response Waveguide™ extends and smooths off-axis dispersion for great sound everywhere in the room.

Aluminum Oxide Tweeters
DM90’s rigid, well-damped tweeter utilizes a new aluminum oxide design that provides smooth extended response with crisp transients and exceptional definition, for lifelike realism whether you’re immersed in a movie or your favorite tunes.

Consistent sound across Definitive Technology series gives you the flexibility to mix and match Dymension™, Dymension CI, and Mythos speakers to design your dream home theater and whole-home system.


  • Purpose-built add-on height modules for Dolby Atmos and DTS:X
  • Upward firing drivers bring Atmos soundtracks to life
  • Easy, quick, and secure plug-and-play installation
  • Aluminum oxide tweeter produces crisp, sparkling highs
  • 5.25” BDSS™ driver provides balanced sound, wide listening area
  • Timbre-matched with other Definitive Technology speakers
  • Accommodates Dymension™ DM80 and DM70 bipolar tower speakers
  • Understated design so the speakers virtually disappear into the room


  • Dimensions (H × W × D): 6.0 × 7.3 × 15.3 in, 152 × 185 × 389 mm
  • Weight: 10.1 lbs (4.6 kg)
  • Color: Black
  • Grille Material: Acoustically transparent black cloth (not removable)
  • Tweeter: (1) 1 in. aluminum oxide dome
  • Midrange/Midbass: (1) 5.25 in. BDSS™ with Linear Response Waveguide™
  • Frequency Response: 81 Hz–30 kHz (-10dB), 130 Hz–27 kHz (-3dB)
  • Nominal Impedance: 4Ω (8Ω compatible)
  • Sensitivity: 90dB (2.83V/1m)
  • Recommended Amplifier Power Rating: 25–100W
  • Certifications: Dolby Atmos

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