In this review, we will be comparing R5 and Q750, two Passive Floor-standing speakers by KEF Let's have a brief look at the main features
of KEF R5 and KEF Q750 first before getting into our more
detailed comparison.
What size room are the KEF R5 and KEF Q750 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 KEF R5 and KEF Q750 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
One of the fundamental differences between these two speakers is that R5 is a 3-way design whereas the Q750 is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
| Driver |
KEF R5 |
KEF Q750 |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 5-inch |
- |
|
Woofer
|
2 x 5.25-inch
|
2 x 6.5-inch
|
R5 features a 1" aluminum Dome Tweeter , a 5" Midrange and 2 x 5.25" Hybrid Aluminum Woofer with a Crossover frequency at 400Hz and 2900Hz. On the other hand, the Q750 features a 1" vented aluminum Dome Tweeter and 2 x 6.5" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
R5 has a frequency range of 58-28k Hz whereas Q750 has a frequency range of 48-28k Hz. With a minimum frequency of 48Hz, the Q750 can go significantly deeper on the low side and provide stronger bass compared to the R5's min frequency of 58Hz.
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
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
R5 and Q750 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. R5 sensitivity is rated at 87 dB and the Q750's is at 88 dB. This 1 dB difference makes the KEF Q750 a more sensitive speaker compared to KEF R5, 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.
R5 can handle a max power of 200 watts RMS from the amp the whereas Q750 has a max power handling value of 150 watts RMS, 50 watts less than the R5.
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
R5 features Binding post posts which make bi-amping or bi-wiring possible. Q750 has a Binding post which doesn't feature bi-amping/bi-wiring.
KEF R5's Binding post terminals allows Bi-amping or bi-wiring
KEF Q750's Binding post terminals
Cabinet Type and Port Position
R5 has a rear firing port whereas Q750 has a front firing ports. KEF Q750's front-firing port gives more flexibility in placement in regards to proximity to walls compared to KEF R5 with its rear-firing port.
KEF R5 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 KEF R5's and KEF Q750's external dimensions. KEF R5 has external dimensions of 1077.0 x 274.0 x 351.0mm ( 42-3/8 x 10-3/4 x 13-13/16inch) whereas KEF Q750 has external dimensions of 945.0 x 328.0 x 315.0mm ( 37-3/16 x 12-7/8 x 12-3/8inch) .
KEF Q750 is 132mm shorter and 36mm less deeper than KEF R5 but it is also 54mm 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 KEF R5 is approximately 961.7cm2 / 149.1inch2 and base area of the KEF Q750 is approximately 1033.2cm2 / 160.1inch2. The R5 requires 7% less surface area than the Q750 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 KEF R5 weighs 27.30kg / 60.1lbs and the KEF Q750 weighs 16.59kg / 36.5lbs. This makes the R5 65% heavier than the Q750.
Here is a comparison of how R5 and Q750'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 KEF R5?
Here are the items that are included inside the box of R5:
Floorstanding loudspeakerGrille2 Foam port plugs4 Outrigger feet4 Spikes4 Protective discs4 Screws4 WashersWrenchHex-keyUser ManualWarranty Information
What's in the Box of KEF Q750?
Here are the items that come with the Q750:
Floorstanding loudspeaker2 Outrigger feet4 Spikes6 Screws6 Washers4 Rubber insertsHex-keyOwners ManualWarranty Information
 Max Input Power |
200 watts
vs
150 watts
|
Handle more power from your amplifier |
 Driver Setup |
3-way
vs
2-way
|
Have a dedicated mid-range driver |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Base Surface Area |
961cm2 (274x351mm)
vs
1033cm2 (328x315mm)
|
Takes less floor space |
 Sensitivity |
88 dB
vs
87 dB
|
Play louder with same amount of amplification power |
 Minimum Impedance |
3.8 ohms
vs
3.2 ohms
|
Very low impedance levels puts more pressure on amplifier |
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
| Low Frequency Response |
48 Hz
vs
58 Hz
|
Generates deeper bass |
 Port Position |
Front
vs
Rear
|
Gives more flexibility placing close to walls |
| Passive Radiator |
2 x 6.25-inch
vs
None
|
Increases the bass performance |
 Dolby Atmos Drivers |
Optional
vs
No
|
Dolby Atmos Compatibility |
 Height |
945mm
vs
1077mm
|
Easier to fit in smaller spaces |
 Price per pair* |
1800USD
vs
3300USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
KEF R5 |
KEF Q750 |
| Brand |
KEF |
KEF |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
15-200 watts |
15-150 watts |
| Sensitivity |
87 dB |
88 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
3.2 ohms |
3.8 ohms |
| Frequency Response |
58-28k Hz |
48-28k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
5.25" |
6.5" |
| Woofer Composition |
Hybrid Aluminum |
Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
5" |
No |
| Crossover Frequency |
400Hz and 2900Hz |
2500Hz |
| Firing Direction |
rear |
front |
Physical Specs |
|
|
| Height |
1077.0mm (42.4") |
945.0mm (37.2") |
| Width |
274.0mm (10.8") |
328.0mm (12.9") |
| Depth |
351.0mm (13.8") |
315.0mm (12.4") |
| Weight |
27.30kg (60.1lbs) |
16.59kg (36.5lbs) |
| Enclosure |
Bass Reflex |
Passive Radiator |
| Finish |
MDF/Lacquer |
MDF/Wood-grain vinyl |
| Available Colors |
Black Gloss, White Gloss, Walnut |
Walnut |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |