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Definitive Technology Demand D15 Review
Definitive Technology Demand D15

Main Features

  • 1" dome Tweeter
  • 5.25" BDSS Midrange
  • 2 x 5.25" Carbon-fiber Woofer
  • 2 x 10-inch Passive Radiators
  • 48-22k Hz Frequency Response
  • 85.5 dB Sensitivity
  • Impedance: 8ohms
  • Power Range: 30-300watts
  • Weight:51.92 lbs / 23.60 kg
  • Dimensions(HxWxD): 40-1/4"x9-1/16"x12-3/4" / 1023.0 x 231.0 x 324.0mm
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Definitive Demand D15 Review
Definitive Demand D15 Definitive Demand D1...
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Definitive Technology Demand D15 is a 3-way Passive Passive Radiator Floor-standing speaker by Definitive Technology. It features a 1" dome Tweeter, 1 x 5.25" Midrange and 2 x 5.25" Carbon-fiber Woofer. Demand D15 also employs 2 x 10-inch passive radiators. The speaker has a frequency range of 48-22k Hz and a sensitivity of 85.5 dB. Definitive Demand D15 has an MSRP of 2798$ per pair but can often be found around 2126$ per pair.

Room Size Suitability

The size of the room where you plan to use the Definitive Demand D15 is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:

Listening Environment* Suitability
Near-fieldBad
Small RoomPoor
Mid-size RoomAverage
Large RoomGood
Very Large RoomAverage

(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2. Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)

Definitive Technology's Demand Series of Loudspeakers

Demand D15 is a member of Definitive Technology's Demand series of Passive speakers. Below you can see the main specs of these speakers.

Definitive Technology Demand Series Speakers
Model Frequency SensitivityImpedance Woofer
Definitive Demand D17
Compare
42-22k Hz 87 dB8Ω 2 x 6.5"
Definitive Demand D7
Compare
67-21k Hz 85 dB8Ω 1 x 4.5"
Definitive Demand D15
48-22k Hz 85.5 dB8Ω 2 x 5.25"
Definitive D5C
Compare
42-22k Hz 85.5 dB8Ω 2 x 5.25"
Definitive Demand D11
Compare
61-22k Hz 90 dB8Ω 1 x 6.5"
Definitive Demand D9
Compare
64-22k Hz 88 dB8Ω 1 x 5.25"


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Frequency Response of the Definitive Demand D15 Speaker

Definitive Demand D15 has a Frequency response range of 48-22k Hz at ±3dB and Power Range of 30-300 watts. With a minimum frequency of 48 Hz, Demand D15 delivers moderate bass depth so depending on your use case, you might want to consider adding a subwoofer to your system.

To focus on the subwoofers that are in a similar price range with Definitive Demand D15, check out the Powered Subwoofers under $3000. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how Demand D15's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
Floor-standing Speakers
Definitive Demand D15
Min
Average
Max
High Frequency
Floor-standing Speakers
Definitive Demand D15
Min
Average
Max
Definitive Demand D15 Woofer
Definitive Demand D15's Carbon-fiber Woofer

Among the speakers in our database with a max MSRP price of 3000$ (Pair), these are the 5 Passive Floor-standing speakers that have the deeper bass levels than the Definitive Demand D15's 48Hz:

  • KLH Kendall with Low Frequency of 25 Hz (Compare w/ Demand D15)
  • GoldenEar Triton Five with Low Frequency of 26 Hz (Compare w/ Demand D15)
  • KLH Concord with Low Frequency of 28 Hz (Compare w/ Demand D15)
  • SVS Ultra Tower with Low Frequency of 28 Hz (Compare w/ Demand D15)
  • GoldenEar Triton Seven with Low Frequency of 29 Hz (Compare w/ Demand D15)

Definitive Demand D15 Tweeter
Definitive Demand D15's aluminum dome Tweeter

Impedance and Sensitivity

Definitive Demand D15's nominal impedance level is 8 ohms and has a sensitivity of 85.5 dB.

Sensitivity
Floor-standing Speakers
Definitive Demand D15
Min
Average
Max

8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Definitive Technology Demand D15 is not considered a difficult to drive speaker from nominal Impedance perspective.

Sensitivity

With a sensitivity level of only 86 dB, Definitive Technology Demand D15 is a difficult to drive speaker from Sensitivity perspective, make sure to choose an amplifier with a high output if you like listening to your music at high volume levels. You may especially have a hard time using Tube amplifiers which are traditionally very low power compared to Class A/B or Class D amps.

Check the amplifiers that are in a similar price range to the Definitive Demand D15:

  • Integrated Amps under 2000 USD
  • Integrated Amps under 3000 USD
  • Integrated Amps under 5000 USD
  • All Integrated Amplifiers

Input Type

Demand D15 has 5-Way post type connectors and lets bi-amping/bi-wiring. Bi-wiring can enhance the overall transparency of your loudspeakers by using separate speaker wires for the low and high-frequency drivers from a single amplifier. Bi-amping, on the other hand, involves using separate amplifiers for the high and low-frequency drivers, potentially resulting in a greater dynamic range and reduced distortion.

Definitive Demand D15 Terminals
Definitive Demand D15's 5-Way post terminals allows Bi-amping or bi-wiring

Definitive Demand D15 External Dimensions and Weight

Definitive Demand D15 has external dimensions of (Height x Width x Depth) 40-1/4 x 9-1/16 x 12-3/4inch (1023.0 x 231.0 x 324.0mm ).

Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base area of Definitive Demand D15 is approximately 748.4cm2 / 116.0inch2.

Weight

The Definitive Demand D15 weighs 23.60kg / 51.9lbs per piece. Here is a comparison of how Demand D15's weight compares with the average, max and min weights in its class.

Weight
All Floor-standing Speakers
Definitive Demand D15
Min
Average
Max
Weight
Floor-standing Speakers under $3000
Definitive Demand D15
Min
Average
Max

Cabinet type and Materials

Definitive Demand D15 has a Passive Radiator type cabinet and a MDF/Aluminum finish.

Speaker Feet

Definitive Demand D15 comes with the parts below which you can use to secure your loudspeaker on the surface that you are putting on:
  • 2 Bases
  • 8 Spike feet
  • 8 Floor-glides
  • It is always recommended to use some kind of feet under all types of speakers. Besides limiting the movement of the speakers, it also compensates for non-flat surfaces and limits the contact surface area of the speaker. Rubber based feet also help isolating the vibrations within certain frequency ranges.

    Definitive Demand D15  Feet
    Definitive Demand D15 Feet

    Available colors

    Definitive Demand D15 is available in Gloss Black.

    Does the Definitive Demand D15 come with a Grille?

    Demand D15 comes with magnetic grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible. Since the included grille of the Demand D15 is magnetic type, it is very easy to put it on and off.

    Definitive Demand D15  with Grille
    Definitive Demand D15 with Grille

    What's in the Box of Definitive Demand D15?

    Here are the items that are included inside the box of Demand D15:
  • Left floorstanding loudspeaker
  • Right floorstanding loudspeaker
  • 2 Grilles
  • 4 Jumper-straps (pre-installed)
  • 2 Bases
  • 8 Spike feet
  • 8 Floor-glides
  • 8 Lock-rings
  • 8 Screws
  • Cleaning cloth
  • Owners Manual
  • Recommended Accessories

    Here is a list of accessories that we think you may need for the Definitive Technology Demand D15.

    • Speaker Cable and Connectors
      • Speaker Cables with Banana Plugs: If you know the lenght of the cable you need, this is the easier option to connect your speakers with your amp.
      • Speaker Cables without Connectors: If you are not sure about the lenght or need longer than standard cables with plugs, choose this option.
      • Banana Connectors and Plugs: If you chose the cables without connectors option or already have some cable around, pick the banana plugs separately.
    • Vibration Isolators: IsoAcoustics isolators more affordable options too.
    • Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.

    Warranty

    5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.

    Definitive Technology Demand D15 Alternatives in Passive Floor-standing Speakers
    Model Type Sensitivity Impedance Frequency
    Definitive Demand D17
    Compare
    3-way 87 dB 8 ohms 42-22k Hz
    Definitive BP-9060
    Compare
    3-way 92 dB 8 ohms 18-49k Hz
    Klipsch RP-8000F
    Compare
    2-way 98 dB 8 ohms 32-25k Hz
    Polk R700
    Compare
    3-way 88 dB 8 ohms 38-38k Hz
    Klipsch RP-8000F II
    Compare
    2-way 98 dB 8 ohms 32-25k Hz
    Definitive BP-9040
    Compare
    3-way 92 dB 8 ohms 22-40k Hz
    Definitive Demand D11
    Compare
    2-way 90 dB 8 ohms 61-22k Hz
    B&W 603
    Compare
    3-way 88.5 dB 8 ohms 48-28k Hz
    Frequently Asked Questions about Definitive Technology Demand D15
    What is the External Dimensions of Definitive Technology Demand D15
    What is the Speaker Sensitivity of Definitive Technology Demand D15
    is the Definitive Technology Demand D15 an easy to drive speaker?

    Definitive Demand D15 Detailed Specifications

    General
    BrandDefinitive Technology
    Full Model NameDefinitive Technology Demand D15
    Speaker Type3-way Floor-standing
    Power Range30-300 watts
    Sensitivity85.5 dB
    Impedance8 ohms
    Frequency Response48-22k Hz
    DRIVERS
    Woofer Size5.25-inch
    Woofer CompositionCarbon-fiber
    Woofer SurroundRubber
    Tweeter Size1-inch
    Tweeter Typedome
    Midrange Size5.25-inch

    CONNECTIONS
    Connector Type5-Way post
    Biamp InputsYes
    PHYSICAL SPECS
    Height1023.0mm ( 40-1/4-inch)
    Width231.0mm ( 9-1/16-inch)
    Depth324.0mm ( 12-3/4-inch)
    Height1023.0mm ( 40-1/4-inch)
    Weight23.60kg ( 51.92 lbs)
    EnclosurePassive Radiator
    FinishMDF/Aluminum
    Available ColorsGloss Black
    Mounting BracketNo
    GrilleYes
    Moisture ResistanceNo
    OTHER
    Handheld RemoteNo
    Parts Warranty5 Years
    Labor Warranty5 Years
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