Definitive Technology Dymension DM40

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

  • Shockingly Spacious Sound
  • Robust Bass
  • Crystal Clear Highs


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

for smooth, detailed

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

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.


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

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.

Dimensions (W x H xD)261 x 950 x 255mm (10.3″ x 37.4″ x 10.0″)
Weight17.3kg (38.1 lbs)
Grille MaterialAcoustically transparent black cloth (not removable)
Tweeter2x 1″ aluminum oxide domes
Midrange/Midbass4x 4.5″ woofers
Enclosure TypePorted
Bipolar ArrayFully balanced, adjustable
Bipolar Array AdjustmentRear tweeter switch: 0dB, -6dB
Subwoofer System Driver Complement1x 8″ subwoofer
2x 8″ passive radiators
Frequency Response38 Hz–30 kHz (-10dB)
55 Hz–23 kHz (-3dB)
Nominal Impedance4Ω (8Ω compatible)
Sensitivity88dB (2.83V/1m)
Recommended Amplifier Power Rating 50-250W
Included Accessories4x Adjustable hard floor glides
4x Adjustable carpet spikes