In this review, we will be comparing Dymension DM70 and R700, two Passive Floor-standing speakers from Definitive Technology and Polk Audio. Let's have a brief look at the main features
of Definitive Dymension DM70 and Polk R700 first before getting into our more
detailed comparison.
What size room are the Definitive Dymension DM70 and Polk R700 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:
In the following sections, we will get into more detail in order to better understand how the Definitive Dymension DM70 and Polk R700 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Drivers
Both Dymension DM70 and R700 are 3-way speakers.
| Driver |
Definitive Dymension DM70 |
Polk R700 |
|
Driver Setup
|
3-way
|
3-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
4 x 5.25-inch |
1 x 6.5-inch |
|
Woofer
|
1 x 10-inch
|
2 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 R700 features a 1" Pinnacle Ring Radiator Tweeter , a 6.5" Midrange and 2 x 8" Polypropylene Woofer with a Crossover frequency at 350Hz and 2700Hz.
Frequency Response
Dymension DM70 has a frequency range of 30-23 kHz whereas R700 has a frequency range of 38-38k Hz. With a minimum frequency of 30Hz, the Dymension DM70 can go significantly deeper on the low side and provide stronger bass compared to the R700's min frequency of 38Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
High Frequency
Floor-standing Speakers
Definitive Dymension DM70
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Dymension DM70 is a 4 ohms speaker compared to the R700 which has a nominal impedance of 8 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the Dymension DM70 can provide this impedance level.
These two speakers also have different sensitivity levels. Dymension DM70 sensitivity is rated at 90 dB and the R700's is rated at 88 dB. This 2 dB difference makes the Definitive Dymension DM70 a more sensitive speaker compared to Polk R700, hence will play louder with the same amount of watts.
Sensitivity
Floor-standing Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.
Dymension DM70 and R700 has the same power range of 50-300 watts.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
R700 features Post posts which make bi-amping or bi-wiring possible. Dymension DM70 has a Binding post which doesn't feature bi-amping/bi-wiring.
Definitive Dymension DM70's Binding post terminals
Polk R700's Post terminals allows Bi-amping or bi-wiring
Polk R700 Port
Physical Specs
Size of a speaker can sometimes become 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 Polk R700'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 Polk R700 has external dimensions of 1143.8 x 320.7 x 428.3mm ( 45 x 12.6 x 16.9inch) .
Definitive Dymension DM70 is 33.7mm narrower and 21.3mm less deeper than Polk R700 but it is also 60.2mm taller.
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 Polk R700 is approximately 1373.6cm2 / 212.9inch2. The Dymension DM70 requires 15% less surface area than the R700 which gives it a small advantage on placement in tight spaces.
Weight Comparison The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The Definitive Dymension DM70 weighs 33.60kg / 73.9lbs and the Polk R700 weighs 35.90kg / 79lbs. This makes the R700 7% heavier than the Dymension DM70.
Here is a comparison of how Dymension DM70 and R700's weights compare with the average, max and min weights in Passive Floor-standing class.
Weight
All Floor-standing Speakers
Definitive Dymension DM70
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
What's in the Box of Polk R700?
Here are the items that come with the R700:
Floorstanding loudspeaker
4 Outrigger feet (pre-installed)
4 Rubber feet (pre-installed)
4 Spike feet (pre-installed)
Grille
Hex-key
Owner's Manual
Online Registration
 Sensitivity |
90 dB
vs
88 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
10 inches
vs
8 inches
|
Larger woofer |
| Low Frequency Response |
30 Hz
vs
38 Hz
|
Generates deeper bass |
 Passive Radiator |
2 x 10-inch
vs
None
|
Increases the bass performance |
 Dolby Atmos Drivers |
Optional
vs
No
|
Dolby Atmos Compatibility |
 Base Surface Area |
1168cm2 (287x407mm)
vs
1373cm2 (320x428mm)
|
Takes less floor space |
 Nominal Impedance |
8 ohms
vs
4 ohms
|
Less selective with amplifiers |
| Number of Woofers |
2
vs
1
|
More woofers |
 High Frequency Response |
38k Hz
vs
23k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Height |
1143mm
vs
1204mm
|
Easier to fit in smaller spaces |
 Price per pair* |
2198USD
vs
3998USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Definitive Technology Dymension DM70 |
Polk Audio Reserve R700 |
| Brand |
Definitive Technology |
Polk Audio |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
50-300 watts |
50-300 watts |
| Sensitivity |
90 dB |
88 dB |
| Impedance |
4 ohms |
8 ohms |
| Impedance |
n/a |
3.6 ohms |
| Frequency Response |
30-23 kHz |
38-38k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
2 |
| Woofer Size |
10" |
8" |
| Woofer Composition |
Polypropelene |
Polypropylene |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
2 x Hard-Dome |
Pinnacle Ring Radiator |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
5.25" |
6.5" |
| Crossover Frequency |
n/a |
350Hz and 2700Hz |
| Firing Direction |
n/a |
bottom |
Physical Specs |
|
|
| Height |
1204.0mm (47.4") |
1143.8mm (45") |
| Width |
287.0mm (11.3") |
320.7mm (12.6") |
| Depth |
407.0mm (16") |
428.3mm (16.9") |
| Weight |
33.60kg (73.9lbs) |
35.90kg (79lbs) |
| Enclosure |
Passive Radiator |
Bass Reflex |
| Finish |
n/a |
MDF/Vinyl |
| Available Colors |
Black |
Black, Walnut, White |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
Yes |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |