In this review, we will be comparing Demand D15 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 Demand D15 and Polk R700 first before getting into our more
detailed comparison.
| Key Specs | Definitive Demand D15 | Polk R700 |
|---|
| Brand | Definitive Technology
United States · founded 1990 | Polk Audio
United States · founded 1972 |
|---|
| Design | 3-way | 3-way |
|---|
| Tweeter | 1" dome | 1" Pinnacle Ring Radiator |
|---|
| Midrange | 5.25" | 6.5" |
|---|
| Woofer | 2 x 5.25" Carbon-fiber | 2 x 8" Polypropylene |
|---|
| Frequency response | 48-22k Hz | 38-38k Hz |
|---|
| Sensitivity | 85.5 dB | 88 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | 30-300 watts | 50-300 watts |
|---|
| Weight | 23.60kg / 51.9lbs | 35.90kg / 79lbs |
|---|
| Dimensions (H x W x D) | 40-1/4" x 9-1/16" x 12-3/4"
1023.0 x 231.0 x 324.0mm | 45" x 12.6" x 16.9"
1143.8 x 320.7 x 428.3mm |
|---|
What size room are the Definitive Demand D15 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:
| Listening Environment* |
Definitive Demand D15 |
Polk R700 |
| Near-field |
Bad |
Bad |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Average |
Average |
| Large Room |
Good |
Good |
| Very Large Room |
Average |
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 Demand D15 and R700 are 3-way speakers.
Definitive Demand D15Polk R700
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 Demand D15 |
Polk R700 |
|
Driver Setup
|
3-way
|
3-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 5.25-inch |
1 x 6.5-inch |
|
Woofer
|
2 x 5.25-inch
|
2 x 8-inch
|
Demand D15 features a 1" aluminum dome Tweeter, a 5.25" Midrange and 2 x 5.25" Carbon-fiber 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
Demand D15 has a frequency range of 48-22k Hz whereas R700 has a frequency range of 38-38k Hz. With a minimum frequency of 38Hz, the R700 can go significantly deeper on the low side and provide stronger bass compared to the Demand D15's min frequency of 48Hz.
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
Demand D15 and R700 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Demand D15 sensitivity is rated at 85.5 dB and the R700's is at 88 dB. This 2 dB difference makes the Polk R700 a more sensitive speaker compared to Definitive Demand D15, 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. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
Both handle the same maximum of 300 watts RMS, though Demand D15 is rated 30-300 watts and R700 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.
Input Type and Bi-Amping / Bi-Wiring
Both Demand D15 and R700 features dual binding post speaker terminals for bi-amping or bi-wiring.
Definitive Demand D15's 5-Way post terminals allows Bi-amping or bi-wiring
Polk R700's Post terminals allows Bi-amping or bi-wiring
Polk R700 Port
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 Demand D15's and Polk R700's external dimensions. Definitive Demand D15 has external dimensions of 1023.0 x 231.0 x 324.0mm (40-1/4 x 9-1/16 x 12-3/4inch) whereas Polk R700 has external dimensions of 1143.8 x 320.7 x 428.3mm (45 x 12.6 x 16.9inch).
Polk R700 is clearly the larger of the two speakers. Its body is 89.7mm wider, 120.8mm taller and 104.3mm deeper than Definitive Demand D15.
Below you can see the front view size comparison of Definitive Demand D15 and Polk R700 in scale.
Comparison image of Definitive Demand D15 and Polk R700 Size and External Dimensions
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 Demand D15 is approximately 748.4cm2 / 116.0inch2 and base area of the Polk R700 is approximately 1373.6cm2 / 212.9inch2. The Demand D15 requires 46% 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 Demand D15 weighs 23.60kg / 51.9lbs and the Polk R700 weighs 35.90kg / 79lbs. This makes the R700 52% heavier than the Demand D15.
Here is a comparison of how Demand D15 and R700's weights compare with the average, max and min weights in Passive Floor-standing class.
Weight
All Floor-standing Speakers
What's in the Box of Definitive Demand D15?
Here are the items that are included inside the box of Demand D15:
- Left floorstanding loudspeaker
- Right floorstanding loudspeaker
- 2 Grilles
- 4 Jumper-straps (pre-installed)
- 2 Bases
- 8 Spike feet
- 8 Floor-glides
- 8 Lock-rings
- 8 Screws
- Cleaning cloth
- Owners Manual
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
 Passive Radiator |
2 x 10-inch
vs
None
|
Increases the bass performance |
 Height |
1023mm
vs
1143mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
748cm2
vs
1373cm2
|
Takes less floor space |
 Sensitivity |
88 dB
vs
86 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
8 inches
vs
5.25 inches
|
Larger woofer |
|
Low Frequency Response |
38 Hz
vs
48 Hz
|
Generates deeper bass |
 High Frequency Response |
38k Hz
vs
22k Hz
|
Generates higher frequency |
 Price per pair* |
2198USD
vs
2798USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Definitive Technology Demand D15 |
Polk Audio Reserve R700 |
| Brand |
Definitive Technology |
Polk Audio |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
30-300 watts |
50-300 watts |
| Sensitivity |
85.5 dB |
88 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
3.6 ohms |
| Frequency Response |
48-22k Hz |
38-38k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
5.25" |
8" |
| Woofer Composition |
Carbon-fiber |
Polypropylene |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
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 |
1023.0mm (40.3") |
1143.8mm (45") |
| Width |
231.0mm (9.1") |
320.7mm (12.6") |
| Depth |
324.0mm (12.8") |
428.3mm (16.9") |
| Weight |
23.60kg (51.9lbs) |
35.90kg (79lbs) |
| Enclosure |
Passive Radiator |
Bass Reflex |
| Finish |
MDF/Aluminum |
MDF/Vinyl |
| Available Colors |
Gloss Black |
Black, Walnut, White |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
Yes |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |
No single best speaker here - they are built to different priorities, and the right one depends on your room, your amplifier and what you listen to.
| Area | Better | Why |
|---|
| Bass | B | Polk R700 digs deeper - 38Hz against 48Hz. |
| Amplifier needs | B | Polk R700 is more sensitive (88dB vs 86dB), so it goes louder on the same amplifier. |
| Headroom | evenly matched | Similar power handling (300W vs 300W). |
| Size | depends | Definitive Demand D15 is easier to place; Polk R700 is bigger, which usually goes with fuller bass. Your room decides. |
| Cabinet | depends | Passive Radiator vs Ported. |
| Expandability | depends | Definitive Demand D15: bi-amping; Polk R700: bi-amping. Polk R700 sits in a wider range (10 models), so a matched surround system is easier later. |
| Price | B | Polk R700 is cheaper - $2,198 against $2,798, about 21% less. |
A Definitive Demand D15 B Polk R700
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Polk R700 is the easier recommendation: it leads on most of the measured areas and costs less. Take Definitive Demand D15 if its size, looks or fit in your room suit you better. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 48Hz anyway, so judge these on the other rows instead. In a large or open-plan room, Polk R700 has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, Definitive Demand D15 is the easier speaker to get right.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.