Definitive Technology Demand Series D9 Bookshelf Speaker Review and Specs (2024)

Definitive Technology Demand Series D9 is a 2-way Passive Passive Radiator Bookshelf speaker by Definitive Technology. 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:

(* 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. Below you can see the main specs of these speakers.

Definitive Technology Demand Series Speakers

	Model	Frequency	Sensitivity	Impedance	Woofer
	Definitive Demand D17 Compare	42-22k Hz	87 dB	8Ω	2 x 6.5"
	Definitive Demand D7 Compare	67-21k Hz	85 dB	8Ω	1 x 4.5"
	Definitive Demand D15 Compare	48-22k Hz	85.5 dB	8Ω	2 x 5.25"
	Definitive D5C Compare	42-22k Hz	85.5 dB	8Ω	2 x 5.25"
	Definitive Demand D11 Compare	61-22k Hz	90 dB	8Ω	1 x 6.5"
	Definitive Demand D9	64-22k Hz	88 dB	8Ω	1 x 5.25"

Frequency Response of the Definitive Demand D9 Speaker

Definitive Demand D9 has a Frequency response range of 64-22k Hz at ±3dB 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.

To focus on the subwoofers that are in a similar price range with Definitive Demand D9, check out the Powered Subwoofers under $750. Alternatively, find the Full list of Powered Subwoofers regardless of the price.

Here we have a comparison of how Demand D9's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.

Impedance and Sensitivity

Definitive Demand D9's nominal impedance level is 8 ohms and has a sensitivity of 88 dB.

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.

Check the amplifiers that are in a similar price range to the Definitive Demand D9:

• Integrated Amps under 500 USD
• Integrated Amps under 750 USD
• Integrated Amps under 1000 USD
• All Integrated Amplifiers

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.

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).

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.

Weight

The 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.

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.

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:

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
• 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.
• 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.