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Definitive Technology Demand™ 11 Piano Black 6.5" Large Bookshelf Loudspeaker

Model #: DEMAND 11 (Black)
Definitive Technology
At a Glance
High Performance Bookshelf Speaker System w/ Top-mounted bass radiator, 1 - 6.50” BDSS bass driver, 1 - 1” aluminum dome tweeter & wave alignment lens, 5-way Binding Posts, Power Handling 25 - 200 watts, Weight: 17 lbs.
$999.00Save $NaN


Get to know this product.

Top-Shelf Performance

Full-range, room-filling sound and precise imaging. These are the true audiophile’s bookshelf loudspeaker of choice.

Superior Midrange and Tight Bass

Balanced Double Surround System and Integrated Passive Bass Radiator.

Precise Imaging

Linear Response Waveguide™

High-Frequency High-Performance

Laterally Offset Tweeter Assembly

Everything in Its Proper Place

Featuring unique technologies such as our Balanced Double Surround System™, linear response waveguide, and laterally offset tweeter assembly, the D11 Large Bookshelf Speakers deliver remarkably smooth, detailed top-shelf audio for true audiophiles.

Aluminum Dome Tweeter for clear, precise highs

The D11 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 D11’s 6.5” patented Balanced Double Surround System™ (BDSS) woofer provides greater excursion and output for superior midrange detail and punchier bass compared with other drivers of similar size.

Integrated Bass Radiator for superior low-end extension

The D11 produces superior low-end extension with an integrated 6” x 10” 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 beautifully balanced audio

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™ all natural, totally precise

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

True audiophiles are obsessive about all sound, not just their music. Designed with meticulous attention to detail, the D11 also flawlessly reproduces home theater audio.

Artistry to the eye and ear

Extruded aluminum front baffles capture a clean, modern aesthetic with a bead-blasted finish for a timeless look and feel to fit any décor.

Each speaker is meticulously sanded and painted with five layers of premium gloss paint, then buffed to a near-mirror finish.



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) 6.5" (16.51 cm) d (Round) Polypropylene BDSS Bass - Mid/Woofer , (1) 1" (2.54 cm) d (Round) Annealed Aluminum Dome and Laterally Offset - Tweeter , (1) 6" (15.24 cm) h x 10" (25.4 cm) w (Oval) Passive - Bass Radiator
Nominal ImpedanceCompatible with 8 ohm outputs
Lower and Upper -3dB Limits61 Hz → 22,000 Hz
Available OrientationsVertical
Mounting LocationBottom of Speakers
AV Receiver Crossover SettingsSmall (60 Hz)

Misc. Specs

Product Weight (lbs.)17
Wattage20 watts-200 watts
Amp20 watts-200 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
Max Sound Level Db90
Impedance8 ohms
Number of Speakers2
Speaker TypeBookshelf Speakers
Depth (in.)12.5
Height (in.)13
Width (in.)7.5
WarningProposition 65 Warning for California Residents