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Definitive Technology Demand™ 9 Piano Black 5.25" Mid-Sized Bookshelf Loudspeakers

Model #: DEMAND 9 (Black)
Definitive Technology
At a Glance
High Performance Bookshelf Speaker System w/ Top-mounted bass radiator, 1 - 5.25” BDSS bass driver, 1 - 1” aluminum dome tweeter & wave alignment lens, 5-way Binding Posts, Power Handling 25 - 150 watts, Weight: 14.4 lbs.
Available in Store Only
$749.00Save $NaN

Get to know this product.

Perfect Balance

Full-range, room-filling sound and precise imaging driven by unique technologies. The D9 delivers a truly premium bookshelf listening experience in a midsize footprint.

Precise Stereo Imaging

Laterally Offset Tweeter Assembly

Superior Low End Extension

Natural Midrange and Smooth Treble

BDSS™ 5.25” Woofer and Linear Response Waveguide™

Finely Balanced

Featuring unique technologies such as our Balanced Double Surround System, linear response waveguide, and laterally offset tweeter assembly, the D9 Mid-Sized Bookshelf Loudspeakers deliver top-shelf, balanced audio for any application.

8” Aluminum Dome Tweeter for clear, precise highs

The D9 couples a laterally offset 1” Aluminum Dome Tweeter with our 20/20 Wave Alignment Lens™. We offset the tweeters by 5°, minimizing wave cancellations off the front baffle to deliver a more precise center stereo image and ensure clear, detailed high-frequency performance.

Exclusive BDSS™ midrange/woofer

The D9’s 5.25” patented Balanced Double Surround System™ (BDSS) mid/bass driver provides greater excursion and output for superior midrange detail and smoother bass compared with other drivers of similar size.

Integrated Bass Radiator for superior low-end extension

The D9 produces superior low-end extension with an integrated 5” x 9” passive bass radiator. Plus, the addition of a larger spider to the radiator reduces rocking and delivers cleaner, tighter bass response.

Audiophile-Quality Crossovers for balance and power

Demand Series crossovers are built with the latest premium audiophile-quality parts, including polypropylene metal-film capacitors and air-core inductors. These high-end components meticulously manage frequencies for clean and crystalline treble, refined and articulate midrange, and linear, low-distortion bass. This ensures that every detail comes through within a clear, balanced presentation that never sacrifices power.

Linear Response Waveguide™ for natural imaging

Our patented Linear Response Waveguide™ extends both on-axis and off-axis frequency dispersion for more natural midrange timbre and precise imaging.

Flawless Home Theater Audio

It isn’t always about the music. Designed for unwavering audio performance, the D9 flawlessly reproduces home cinema audio, too.

Artistry to the eye and ear

Extruded aluminum front baffles capture a clean, modern aesthetic with a bead-blasted finish to fit any decor.

Each speaker is meticulously sanded and painted with five layers of premium gloss paint, then buffed to a near-mirror finish for an undeniably fashionable look in your home.



Total Pieces2
Included Accessories(2) Acoustically transparent magnetic black speaker grilles
Optional Accessories(1) ST1 Demand Series Speaker Stands (Pair) - Sold Separately
Cabinet Warranty5 years
Drivers Warranty5 years
Original Purchaser OnlyYes

High-Performance Bookshelf Speakers

Qty IncludedPair
Driver Enclosure TypeMDF cabinet with extruded natural bead-blasted aluminum front baffle
Driver Complement(1) 5.25" (13.34 cm) d (Round) Polypropylene BDSS Bass - Mid/Woofer, (1) 1" (2.54 cm) d (Round) Annealed Aluminum Dome and Laterally Offset - Tweeter, (1) 5" (12.7 cm) h x 9" (22.86 cm) w (Oval) Passive - Bass Radiator
Lower and Upper -3dB Limits64 Hz → 22,000 Hz
Speaker Inputs(1) (Set) 5-Way Binding Posts - Gold Plated
Available OrientationsVertical
Mounting LocationBottom of Speakers
Recommended Amplifier Power Per Channel20 watts → 150 watts
AV Receiver Crossover SettingsSmall (80 Hz)

Misc. Specs

Product Weight (lbs.)14.4
Wattage20 watts -150 watts
Frequency Response44Hz - 24kHz
Color Finish NamePiano Black
Manufacturer Warranty5 years
Mounting Type1/4 in - 20 Threaded Insert
Speaker Connector Type5-Way (Universal) Binding Posts
Impedance4 Ohms
Number of Speakers2
Speaker TypeBookshelf Speakers
Depth (in.)11.97
Height (in.)11.71
Width (in.)6.5
WarningProposition 65 Warning for California Residents