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.

DM95 On-Wall Surround Speaker 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.

Specifications

• Dimensions (H x W x D): 37.4 x 10.3 x 10.0 in. (950 x 261 x 255 mm)
• Weight: 38.1 lbs (17.3 kg)
• Color: Black
• Grille Material: Acoustically transparent black cloth (not removable)
• Tweeter: (2) 1 in. aluminum oxide domes
• Midrange/Midbass: (4) 4.5 in. woofers
• Enclosure Type: Ported
• Bipolar Array: Fully balanced, adjustable
• Bipolar Array Adjustment: Rear tweeter switch: 0dB, -6dB
• Frequency Response: 38 Hz–30 kHz (-10dB)
• 55 Hz–23 kHz (-3dB)
• Nominal Impedance: 4Ω (8Ω compatible)
• Sensitivity: 87dB (2.83V/1m)
• Recommended Amplifier Power Rating: 50-250W
• Warranty: 2 years
• Included Accessories: (4) Adjustable hard floor glides
• (4) Adjustable carpet spikes