Definitive Technology Demand Series D9 High-Performance Bookshelf Speakers with Speaker Stands - Pair

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Regular Price: $1,278.00

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Model: WWSDD9STB UPC: 741718962432 Item: 175853

Product Information

This Package Includes

Demand Series D9 High-Performance Bookshelf Speakers - Pair (Black) 

Definitive Technology Demand D9 high-performance bookshelf speakers deliver full-range, room-filling sound and precise imaging in modern, elegant styling. Featuring technology advancements to Definitive Tech's aluminum dome tweeter and midrange/woofer sections, each speaker delivers an unrivaled sweet spot, smoother high-frequency reproduction, and three-dimensional imaging for the most technically-advanced, premium bookshelf listening experience.


  • 1” aluminum dome tweeter with 20/20 wave alignment lens and laterally offset tweeter assembly
  • Laterally offset tweeter assembly
  • BDSS (Balanced Double Surround System) midrange/woofer
  • Integrated passive bass radiator in each speaker produces superior low-end extension

With 20/20 Wave Alignment Lens and Laterally Offset Tweeter Assembly

Coupled with Definitive Tech's new 20/20 wave alignment lens, the annealed aluminum dome tweeter delivers smoother high-frequency response and improved dispersion for a rich and balanced listening experience. Offsetting the tweeter by 5° delivers a more precise center stereo image by eliminating undesirable symmetric diffraction off the corners of the front baffle.

Extruded Aluminum Front Baffle

Clean, modern industrial design with a bead-blasted finish provides a timeless look and feel that fits any décor.

Linear Response Waveguide

Patented linear response waveguide extends both on and off-axis frequency response while improving dispersion for more natural mid-range timbre and more precise imaging.  

BDSS Midrange Woofer

Patented Balanced Double Surround System (BDSS) midrange/woofer provides greater excursion and output that results in superior mid-range detail and punchier bass compared to drivers of similar size.

Passive Bass Radiator

Integrated passive bass radiator in each speaker produces superior low-end extension. Plus, the addition of a larger spider reduces rocking and increases linearity for deep, tight, clean bass response.

Painted Gloss Black Cabinet

Each cabinet is hand-crafted to blend seamlessly with your lifestyle—meticulously sanded, painted with five layers of premium black gloss paint, then buffed for a near-mirror finish (Level 6) for an uncompromising look in your home.

Annealed Aluminum Dome Tweeter

Definitive Tech's annealed aluminum tweeters are precision engineered to articulate nuance and detail in the high-frequency bands for a crystal-clear listening experience.

Acoustically Transparent Magnetic Grille

The included acoustically transparent magnetic black speaker grilles provide natural, uncolored sound when placed on the speaker, and remove easily when you want to enjoy looking at them fully uncovered.

Speaker Stands for Demand Series D9 - Pair

ST1 bookshelf speaker stands are the perfect accessory for your Demand Series D9 and D11 bookshelf speakers. The elongated steel stand, MDF base plate, and rubber speaker pads all combine to provide a solid and stable speaker foundation, ensuring the cleanest, most precise listening experience in everything you hear.


  • Fillable with your choice of dry material to provide a solid and stable speaker foundation
  • Designed for Demand Series D9 and D11 high-performance bookshelf speakers

Optimal Height

Designed, engineered, and calibrated to provide optimal imaging, depth of field, and height no matter what your room and setup look like.

Large Mass Fill Space

Bolster stability, optimize the bass response, and eliminate unwanted vibration and distortion by filling each one with sand — ensuring you hear what you’re supposed to and nothing else.

Built-In Threaded Inserts

Lock your D9 and D11 bookshelf speakers firmly in place for more precise imaging and room-filling sound, while preventing movement and potential damage — especially when they’re seated at higher levels.

Timeless Design

Complements the premium performance and minimalist aesthetic of the Demand Series bookshelf speakers with a matte black finish — and they look great in any room.

Includes Adjustable Spikes and Optional Rubber Spike Caps

Help keep your speakers firmly in place whether on carpet or other solid floor surfaces like hardwood or cement.

Rubber Speaker Pads

Top plates include a built-in rubber pad for additional protection against damage to the speakers’ gloss black cabinet.




Demand Series D9 High-Performance Bookshelf Speakers - Pair (Black)

  • Dimensions (H x W x D): 11.71" x 6.5" x 11.97"
  • Driver enclosure type: MDF cabinet with the extruded natural bead-blasted aluminum front baffle
  • Driver complement
    • 5.25" diameter polypropylene BDSS bass - mid/woofer
    • 1" diameter annealed aluminum dome and laterally offset - tweeter
    • 5" x 9" (H x W) passive - bass radiator
  • Total frequency response: 44Hz - 24Hz
  • Nominal impedance: 8 ohms
  • Sensitivity (1 watt @ 1 meter): 88dB
  • Lower and upper - 3dB limits: 64Hz - 22Hz
  • Mounting type: 1/4" - 20 threaded insert
  • Speaker inputs: 5-way binding posts - gold plated
  • Recommended amplifier power per channel: 20W - 150W
  • A/V receiver crossover settings: Small (80Hz)

Speaker Stands for Demand Series D9 - Pair

  • Materials: Steel post, aluminum collar, MDF base
  • Compatibility: Demand D11 and D9 bookshelf speakers


What's in the Box

What's in the Box

  • Demand Series D9 High-Performance Bookshelf Speakers - Pair (Black)
    • Grilles
  • Speaker Stands for Demand Series D9 - Pair
    • 4 metal carpet spikes
    • 4 metal carpet spike rubber caps


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