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  1. Home
  2. Definitive Technology Speakers
  3. Passive Surround Speakers
  4. Definitive Technology Dymension DM90
Definitive Technology Dymension DM90 Review
Definitive Technology Dymension DM90 - Front View

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Main Features

  • 1" Hard-Dome Tweeter
  • 5.25" Woofer
  • 130-27k Hz Frequency Response
  • 90 dB Sensitivity
  • Impedance: 4ohms
  • Weight: 10.10 lbs / 4.58 kg
  • Dimensions(HxWxD): 6"x7-5/16"x15-5/16" / 152.4 x 185.7 x 388.9mm
MSRP: $849 (list price)
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Definitive Technology Dymension DM90 Review
Definitive Technology Dymension DM90 Definitive Technolog...
Check price atAmazon›

Made by Definitive Technology · United States · since 1990 · sold through dealers

Definitive Technology Dymension DM90 is a 2-way Passive Surround speaker by Definitive Technology. It was released in February 2023. It features a 1" Hard-Dome Tweeter and 1 x 5.25" Woofer. The speaker has a frequency range of 130-27k Hz and a sensitivity of 90 dB. Definitive Technology Dymension DM90 has an MSRP of 849$ per pair but can often be found around 0$ per pair.

Definitive Technology's Dymension Series of Loudspeakers

Dymension DM90 is a member of Definitive Technology's Dymension series of Passive speakers. The Dymension range is Definitive Technology's flagship tower and bookshelf line with balanced-array drivers. Below you can see the main specs of these speakers.

See all 8 Definitive Technology Dymension models compared »

Definitive Technology Dymension Series Speakers
Model Frequency SensitivityImpedance Woofer
Definitive Dymension DM80
Compare
28-23k Hz 90 dB4Ω 1 x 12"
Definitive Dymension DM30
Compare
41-23k Hz 93 dB4Ω 1 x 8"
Definitive Dymension DM20
Compare
91-23k Hz 89 dB4Ω 4 x 4.5"
Definitive Dymension DM40
Compare
55-23k Hz 87 dB4Ω 4 x 4.5"
Definitive Dymension DM10
Compare
81-23k Hz 90 dB4Ω 2 x 5.25"
Definitive Dymension DM60
Compare
34-23k Hz 88 dB4Ω 1 x 8"
Definitive Dymension DM70
Compare
30-23k Hz 90 dB4Ω 1 x 10"
Definitive Technology Dymension DM90
130-27k Hz 90 dB4Ω 1 x 5.25"
Definitive Technology Dymension Series Speakers
Definitive Technology Dymension Series Speakers

Frequency Response of the Definitive Technology Dymension DM90 Speaker

Definitive Technology Dymension DM90 has a Frequency response range of 130-27k Hz. With a minimum frequency of 130 Hz, it is hard to expect a strong bass response from Dymension DM90 so depending on your use case, using a subwoofer will significantly help to widen the response range.

Here we have a comparison of how Dymension DM90's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Surround Speakers
Definitive Technology Dymension DM90
Min
Average
Median
Thinking about a subwoofer for the Definitive Technology Dymension DM90?
  • Work out the crossover setting - it follows from this speaker's 130 Hz low end
  • Powered subwoofers under $1,000 - a similar price range to these speakers
  • Every powered subwoofer we cover, whatever the budget

Impedance and Sensitivity

Definitive Technology Dymension DM90's nominal impedance level is 4 ohms and has a sensitivity of 90 dB.

Sensitivity
Surround Speakers
Definitive Technology Dymension DM90
Min
Average
Median

Nominal Impedance of the 4 Ohms means that the Definitive Technology Dymension DM90 is a difficult to drive speaker from nominal Impedance perspective, make sure that you choose an amplifier than can provide 4 Ohms for this speaker.

Many AVRs (audio/video receiver) in the market may have difficulty when the speakers dip below the 4 Ohms levels (this may cause clipping or even physical damage), so we recommend to not pair the Definitive Technology Dymension DM90 with an AVR but use an Integrated Amplifier instead.

Sensitivity

90dB of the Definitive Technology Dymension DM90 is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise. Work out how loud the Definitive Technology Dymension DM90 plays in your room →

Running more than one pair from a single amplifier? Check the load it would present →

What amplifier does the Definitive Technology Dymension DM90 need?

At normal listening levels in a medium room, about 15–240 W per channel into 4 ohms. Set your own conditions and we will rank every amplifier we cover.

We check power, impedance safety and current delivery - not just watts.

Prefer to browse? Integrated amplifiers under $1,000, or every amplifier we cover.

Input Type

Dymension DM90 features Proprietary type connectors.

Work out what gauge speaker cable this run needs →

Definitive Technology Dymension DM90 External Dimensions and Weight

Definitive Technology Dymension DM90 has external dimensions of (Height x Width x Depth) (152.4 x 185.7 x 388.9mm ).

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 Technology Dymension DM90 is approximately 722.2cm2 / 111.9inch2.

Find speakers that fit your shelf or alcove →

Weight

The Definitive Technology Dymension DM90 weighs 4.58kg / 10.1lbs per piece. Here is a comparison of how Dymension DM90's weight compares with the average, max and min weights in its class.

Weight
All Surround Speakers
Definitive Technology Dymension DM90
Min
Average
Median
Weight
Surround Speakers under $1000
Definitive Technology Dymension DM90
Min
Average
Max

Available colors

Definitive Technology Dymension DM90 is available in Black.

Recommended Accessories

Here is a list of accessories that we think you may need for the Definitive Technology Dymension DM90.

  • 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 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.

Warranty

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

Definitive Technology Dymension DM90 Alternatives in Passive Surround Speakers
Model Type Sensitivity Impedance Frequency
Definitive Dymension DM10
Compare
2-way 90 dB 4 ohms 81-23 kHz
Definitive Dymension DM40
Compare
2-way 87 dB 4 ohms 55-23 kHz
Definitive Dymension DM20
Compare
2-way 89 dB 4 ohms 91-23 kHz
Definitive Dymension DM60
Compare
3-way 88 dB 4 ohms 34-23 kHz
Definitive Dymension DM70
Compare
3-way 90 dB 4 ohms 30-23 kHz
Definitive Dymension DM80
Compare
3-way 90 dB 4 ohms 28-23 kHz
Definitive Dymension DM30
Compare
3-way 93 dB 4 ohms 41-23 kHz
Frequently Asked Questions about Definitive Technology Dymension DM90

What amplifier do you need for the Definitive Technology Dymension DM90?

The Definitive Technology Dymension DM90 is a 4-ohm speaker, a demanding load that wants an amplifier rated to drive 4 ohms - many budget receivers are not.

Is the Definitive Technology Dymension DM90 easy to drive?

The Definitive Technology Dymension DM90 has a sensitivity of 90 dB. That is high: it goes loud on modest power, so it suits low-powered amplifiers, including valve/tube designs.

Does the Definitive Technology Dymension DM90 need a subwoofer?

The Definitive Technology Dymension DM90 reaches down to 130Hz (full range 130-27k Hz). That leaves the lowest octaves out, so a subwoofer will make a clear difference for films and bass-heavy music.

What drivers does the Definitive Technology Dymension DM90 use?

The Definitive Technology Dymension DM90 is a 2-way design using a 1" Hard-Dome tweeter and a 5.25" woofer.

Is the Definitive Technology Dymension DM90 sealed or ported?

The Definitive Technology Dymension DM90 uses a Sealed enclosure. A sealed box trades some output for tighter, more even bass and is the more forgiving choice close to a wall.

How big and heavy is the Definitive Technology Dymension DM90?

The Definitive Technology Dymension DM90 weighs 4.58kg / 10.1lbs each.

How much does the Definitive Technology Dymension DM90 cost?

The Definitive Technology Dymension DM90 has a manufacturer's list price (MSRP) of $849 per pair.


Definitive Technology Dymension DM90 Detailed Specifications

General
BrandDefinitive Technology
Full Model NameDefinitive Technology Dymension DM90
Speaker Type2-way Surround
Sensitivity90 dB
Impedance4 ohms
Frequency Response130-27k Hz
Release DateFebruary 2023
DRIVERS
Woofer Size5.25-inch
Woofer Composition
Tweeter Size1-inch
Tweeter TypeHard-Dome

CONNECTIONS
Connector TypeProprietary
PHYSICAL SPECS
Height152.4mm ( 6-inch)
Width185.7mm ( 7-5/16-inch)
Depth388.9mm ( 15-5/16-inch)
Height152.4mm ( 6-inch)
Weight4.58 kg (10.1 lbs)
Enclosure
FinishMDF/Cloth
Available ColorsBlack
Moisture ResistanceNo
OTHER
Handheld RemoteNo
Parts Warranty5 Years
Labor Warranty5 Years
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