In this review, we will be comparing two different types of speakers by Definitive Technology. Definitive Technology Dymension DM70 is a Floor-standing speaker whereas the Dymension DM30 is a Center Channel speaker.
Let's have a brief look at the main features
of Definitive Dymension DM70 and Definitive Dymension DM30 first before getting into our more
detailed comparison.
| Key Specs | Definitive Dymension DM70 | Definitive Dymension DM30 |
|---|
| Brand | Definitive Technology
United States · founded 1990 | Definitive Technology
United States · founded 1990 |
|---|
| Design | 3-way | 3-way |
|---|
| Tweeter | 1" 2 x Hard-Dome | 1" Hard-Dome |
|---|
| Midrange | 4 x 5.25" | 4 x 5.25" |
|---|
| Woofer | 10" Polypropelene | 8" Polypropelene |
|---|
| Frequency response | 30-23 kHz | 41-23 kHz |
|---|
| Sensitivity | 90 dB | 93 dB |
|---|
| Impedance | 4 ohms | 4 ohms |
|---|
| Power range | 50-300 watts | 50-300 watts |
|---|
| Weight | 33.60kg / 73.9lbs | 24.50kg / 53.9lbs |
|---|
| Dimensions (H x W x D) | 47.4" x 11.3" x 16"
1204 x 287 x 407 mm | 7.5" x 31.5" x 15.9"
190 x 800 x 403 mm |
|---|
Dymension DM70 and Dymension DM30 are members of Definitive Technology's Dymension series of speakers. Below you can find the loudspeakers from this series.
Definitive Technology Dymension Series
History
What size room are the Definitive Dymension DM70 and Definitive Dymension DM30 speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision
factor. Here we have compared their suitability to various sizes of environments considering their size
and max power parameters:
| Listening Environment* |
Definitive Dymension DM70 |
Definitive Dymension DM30 |
| Near-field |
Are you nuts? |
Poor |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Average |
Good |
| Large Room |
Good |
Good |
| Very Large Room |
Good |
Average |
(* 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.)
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
Both Dymension DM70 and Dymension DM30 are 3-way speakers.
Definitive Dymension DM70Definitive Dymension DM30
TweeterMidrangeWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Definitive Dymension DM70 |
Definitive Dymension DM30 |
|
Driver Setup
|
3-way
|
3-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
4 x 5.25-inch |
4 x 5.25-inch |
|
Woofer
|
1 x 10-inch
|
1 x 8-inch
|
Dymension DM70 features a 1" aluminum oxide 2 x Hard-Dome Tweeter, a 5.25" Midrange and 1 x 10" Polypropelene Woofer. On the other hand, the Dymension DM30 features a 1" aluminum oxide Hard-Dome Tweeter, a 5.25" Midrange and 1 x 8" Polypropelene Woofer.
Frequency Response
Dymension DM70 has a frequency range of 30-23 kHz whereas Dymension DM30 has a frequency range of 41-23 kHz. With a minimum frequency of 30Hz, the Dymension DM70 can go significantly deeper on the low side and provide stronger bass compared to the Dymension DM30's min frequency of 41Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Dymension DM70 and Dymension DM30 have the same Impedance of 4 ohms but where they differ is the sensitivity levels. Dymension DM70 sensitivity is rated at 90 dB and the Dymension DM30's is at 93 dB. This 3 dB difference makes the Definitive Dymension DM30 a more sensitive speaker compared to Definitive Dymension DM70, hence will play louder with the same amount of watts.
One thing to keep in mind that the lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit comared to higher impedance speakers especially at high volume levels, so make sure the amp you pair with the Dymension DM70 and the Dymension DM70 can provide this impedance level.
Sensitivity
Floor-standing Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
Dymension DM70 and Dymension DM30 have the same power range of 50-300 watts.
Note that higher power handling does not make a speaker louder: that depends mainly on
sensitivity and impedance. The calculator below shows how loud each of these actually plays
on a real amplifier.
Which plays louder on your amplifier?
Starting with a popular amplifier - change it to the one you own, or any you are
considering, and watch both numbers move.
Definitive Dymension DM70
Definitive Dymension DM30
Input Type and Bi-Amping / Bi-Wiring
Dymension DM70 features Binding post type posts and Dymension DM30 has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
Definitive Dymension DM70's Binding post terminals
Definitive Dymension DM30's Binding post terminals
Physical Specs
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Definitive Dymension DM70's and Definitive Dymension DM30's external dimensions. Definitive Dymension DM70 has external dimensions of 1204 x 287 x 407 mm (47.4 x 11.3 x 16.0 in) whereas Definitive Dymension DM30 has external dimensions of 190 x 800 x 403 mm (7.5 x 31.5 x 15.9 in).
Definitive Dymension DM30 is 1014mm shorter and 4mm less deeper than Definitive Dymension DM70 but it is also 513mm wider.
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base surface area of the Definitive Dymension DM70 is approximately 1168.1cm2 / 181.1inch2 and base area of the Definitive Dymension DM30 is approximately 3224.0cm2 / 499.7inch2. The Dymension DM70 requires 64% less surface area than the Dymension DM30 which gives it a small advantage on placement in tight spaces.
What's in the Box of Definitive Dymension DM70?
Here are the items that are included inside the box of Dymension DM70:
- 4 Adjustable hard floor glides
- 4 Adjustable carpet spikes