Definitive Technology Slim Bipolar Tower Speaker in Black - DM40

Model #:DM40 , UPC #:747192137120

Dymension DM40 Slim Bipolar Tower Speaker

Incredible, Room-Filling Sound


Dymension™ DM40 tower speakers deliver dynamic, room-filling sound with robust bass by leveraging Definitive Technology’s signature bipolar arrays.



Shockingly Spacious Sound

The fully balanced, adjustable bipolar driver array fills the room with enveloping sound

Robust Bass

The tuned, ported cabinet is acoustically optimized for improved bass response and midrange clarity


Crystal Clear Highs

An aluminum oxide tweeter delivers smooth, crisp, sparkling highs throughout the room


Spacious, Immersive Soundstage

Anatomy of an Iconic Speaker

The Dymension DM40 fills your home theater with larger-than-life sound. Crystal clear highs, incredible depth-of-field, and robust bass envelop you whether you’re enjoying the latest blockbuster film or your favorite songs. Innovations include aluminum oxide tweeters, an adjustable bipolar array, and an acoustically optimized enclosure.


Fully Balanced, Adjustable Bipolar Array for a spacious, immersive soundstage

Bipolar driver arrays direct more sound in more directions than traditional speakers, for incredible depth-of-field and a truly enveloping listening experience. Adjustable to optimize for room placement.


Long-Throw Midrange Woofers for smooth, detailed response

DM40’s four 4.5" woofers feature composite polymer cones that produce superior midrange detail. Long-throw surrounds optimize driver excursion for improved low-end performance.


Ported Enclosure with Column Resonance Control for robust bass response

A tuned cabinet features acoustically optimized chambers for improved bass extension and midrange clarity.


Aluminum Oxide Tweeters for crystal clear highs

New driver designs provide smooth extended response with crisp transients, exceptional definition, and pinpoint-precise imaging, for incredible clarity and lifelike realism.


Slim Cabinet Design for unobtrusive integration into rooms

The DM40’s slim footprint makes it easy to integrate into virtually any room setting. And, it looks as good as it sounds.


The Ultimate Atmos Experience for immersive sound that pulls you inside the action

Bring the thrills of the movie-theater experience home with stunning sound enveloping you from every angle, transporting you inside every scene and song.



Cinematic movie magic

Get swept away by the action onscreen as you’re enveloped in a deep, defined soundstage. From a whisper to a roar, experience it all in striking realism.



A Concert in Your Living Room

Fully balanced bipolar arrays fill the entire room with enveloping sound. Your speakers seem to vanish as you hone in on every voice and pinpoint every instrument—just like being there, live.



Level Up Your Gaming Environment

Whether you’re fighting evil or exploring new universes, unlock the ultimate experience when you hear sonic details in dazzling new dimensionality.


Wall-Mountable Surround Speaker/Height Module for unforgettable Atmos experiences

Available separately, this Atmos- and DTS:X-compatible, wall-mountable surround speaker extends sound above you, for total sonic immersion with hyper-realistic overhead effects.


Timbre-Matched for seamless Definitive Technology sound

Consistent sound across other Definitive Technology series gives you the flexibility to mix and match Dymension™ and all Definitive Technology in-wall and in-ceiling speakers to design your dream home theater and whole-home system.


Stability and versatility for flexible placement

Included cabinet foot spikes and pads provide the ideal way to place and level DM40 speakers on virtually any floor surface, providing acoustic isolation and stability.

Included Accessories (4) Adjustable hard floor glides, (4) Adjustable carpet spikes
Warranty5 years
Recommended Amplifier Power Rating50250W
Sensitivity87dB (2.83V/1m)
Nominal Impedance4Ω (8Ω compatible)
Frequency Response38 Hz–30 kHz (10dB), 55 Hz–23 kHz (3dB)
Bipolar Array AdjustmentRear tweeter switch: 0dB, 6dB
Enclosure TypePorted
Bipolar ArrayFully balanced, adjustable
Midrange/Midbass(4) 4.5 in. woofers
Tweeter(2) 1 in. aluminum oxide domes
Grille MaterialAcoustically transparent black cloth (not removable)
Weight38.1 lbs (17.3 kg)
Dimensions (H x W x D)37.4 x 10.3 x 10.0 in. (950 x 261 x 255 mm)

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