Definitive Technology Demand Series D9 is a 2-way Passive Radiator Bookshelf speaker by Definitive Technology. It was released in 2018. It features a 1" Hard-Dome Tweeter and 1 x 5.25" Polypropylene Woofer. The speaker has a frequency range of 64-22k Hz and a sensitivity of 88 dB. Definitive Demand D9 has an MSRP of 749$ per pair but can often be found around 599$ per pair.
Room Size Suitability
The size of the room where you plan to use the Definitive Demand D9 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-field | Poor |
| Small Room | Average |
| Mid-size Room | Good |
| Large Room | Average |
| Very Large Room | Poor |
(* 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 D9 is a member of Definitive Technology's Demand series of Passive speakers. The Demand range is Definitive Technology's premium bookshelf line, with an offset tweeter for a wider soundstage. Below you can see the main specs of these speakers.
See all 6 Definitive Technology Demand models compared »
Definitive Technology Demand Series Speakers
Frequency Response of the Definitive Demand D9 Speaker
Definitive Demand D9 has a Frequency response range of 64-22k Hz and Power Range of 20-150 watts. With a minimum frequency of 64 Hz, it is hard to expect a strong bass response from Demand D9 so depending on your use case, using a subwoofer will significantly help to widen the response range.
Here we have a comparison of how Demand D9's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Bookshelf Speakers
Thinking about a subwoofer for the Definitive Demand D9?
Impedance and Sensitivity
Definitive Demand D9's nominal impedance level is
8 ohms and has a sensitivity of
88 dB.
Sensitivity
Bookshelf Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Definitive Technology Demand Series D9 is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
88dB of the Definitive Technology Demand Series D9 is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise. Work out how loud the Definitive Demand D9 plays in your room →
What amplifier does the Definitive Demand D9 need?
At normal listening levels in a medium room, about
12–150 W
per channel into 8 ohms.
Set your own conditions and we will rank every amplifier we cover.
Prefer to browse? Integrated amplifiers under $750, or every amplifier we cover.
Input Type
Demand D9 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.
Work out what gauge speaker cable this run needs →
Definitive Demand D9 External Dimensions and Weight
Definitive Demand D9 has external dimensions of (Height x Width x Depth) 11-13/16 x 6-9/16 x 12-7/16inch (301.0 x 167.0 x 316.0mm ).
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 D9 is approximately 527.7cm2 / 81.8inch2.
To get a better perspective on the real life size of Definitive Demand D9, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).
Definitive Demand D9 Speaker Size Compared to a Compact Disc
Here we place the Definitive Demand D9 virtually next to a standard width amplifier and turntable on a BDI Octave Media Cabinet to get a better idea about the size.
Definitive Demand D9 Speaker next to an amplifier and turntable
Find speakers that fit your shelf or alcove → · Work out where they should sit in the room →
WeightThe Definitive Demand D9 weighs 7.73kg / 17lbs per piece. Here is a comparison of how Demand D9's weight compares with the average, max and min weights in its class.
Weight
All Bookshelf Speakers
Weight
Bookshelf Speakers under $750
How does the Definitive Demand D9 compare to the Definitive Technology Demand Series D11?
One of the natural alternative to the Definitive Demand D9 is the Demand D11 which is located one step higher in Definitive Technology's Passive Bookshelf selection.
Here is a scaled size comparison of these two speakers to give you an idea how their external dimensions compare:
Comparison image of Definitive Demand D9 and Definitive Demand D11 Size and External Dimensions
Check the Detailed Comparison of Definitive Demand D9 vs Demand D11 for more details.
Cabinet type and Materials
Definitive Demand D9 has a
Passive Radiator type cabinet and a MDF/Aluminum finish.
Available colors
Definitive Demand D9 is available in Gloss White and Piano Black.
Wall Mounting
Demand D9 doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.
Does the Definitive Demand D9 come with a Grille?
Demand D9 comes with 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.
What's in the Box of Definitive Demand D9?
Here are the items that are included inside the box of Demand D9:
- Left bookshelf loudpseaker
- Right bookshelf loudspeaker
- 2 Grilles
- 4 Jumper-straps (pre-installed)
- Cleaning cloth
- Owners Manual
Recommended Accessories
Here is a list of accessories that we think you may need for the Definitive Technology Demand Series D9.
- Speaker Cable and Connectors
- Vibration Isolators: IsoAcoustics isolators are our favorite isolators but you may find 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.
- Speaker Stands: Stands bring your bookshelf speakers to ideal height (rule of thumb is to have the tweeter level with your ear in your listening position), helps stability and acoustical isolation.
Warranty
5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.