In this review, we will be comparing ES60 and Q750, two Passive Floor-standing speakers from Polk Audio and KEF. Let's have a brief look at the main features
of Polk ES60 and KEF Q750 first before getting into our more
detailed comparison.
What size room are the Polk ES60 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 Polk ES60 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
Both ES60 and Q750 are 2-way speakers.
| Driver |
Polk ES60 |
KEF Q750 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
3 x 6.5-inch
|
2 x 6.5-inch
|
ES60 features a 1" Terylene High-Res Soft-Dome Tweeter and 3 x 6.5" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz. 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
ES60 has a frequency range of 32-40k Hz whereas Q750 has a frequency range of 48-28k Hz. With a minimum frequency of 32Hz, the ES60 can go significantly deeper on the low side and provide stronger bass compared to the Q750's min frequency of 48Hz.
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
ES60 and Q750 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. ES60 sensitivity is rated at 90 dB and the Q750's is at 88 dB. This 2 dB difference makes the Polk ES60 a more sensitive speaker compared to KEF Q750, 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.
ES60 can handle a max power of 300 watts RMS from the amp the whereas Q750 has a max power handling value of 150 watts RMS, 150 watts less than the ES60.
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
ES60 features 5-Way post posts which make bi-amping or bi-wiring possible. Q750 has a Binding post which doesn't feature bi-amping/bi-wiring.
KEF Q750's Binding post terminals
Cabinet Type and Port Position
ES60 has a bottom 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 Polk ES60 with its rear-firing 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 Polk ES60's and KEF Q750's external dimensions. Polk ES60 has external dimensions of 1131.0 x 216.0 x 401.0mm ( 44-1/2 x 8-1/2 x 15-3/4inch) 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 186mm shorter and 86mm less deeper than Polk ES60 but it is also 112mm 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 Polk ES60 is approximately 866.2cm2 / 134.3inch2 and base area of the KEF Q750 is approximately 1033.2cm2 / 160.1inch2. The ES60 requires 16% 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 Polk ES60 weighs 23.60kg / 51.9lbs and the KEF Q750 weighs 16.59kg / 36.5lbs. This makes the ES60 42% heavier than the Q750.
Here is a comparison of how ES60 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 Polk ES60?
Here are the items that are included inside the box of ES60:
Floorstanding loudspeakerGrille (attached)4 Feet (pre-installed)Owners ManualOnline Product Registration
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 |
300 watts
vs
150 watts
|
Handle more power from your amplifier |
 Sensitivity |
90 dB
vs
88 dB
|
Play louder with same amount of amplification power |
 Number of Woofers |
3
vs
2
|
More woofers |
| Low Frequency Response |
32 Hz
vs
48 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
28k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Base Surface Area |
866cm2 (216x401mm)
vs
1033cm2 (328x315mm)
|
Takes less floor space |
 Price per pair* |
1098USD
vs
1800USD
|
costs less (*prices may change depending on the seller, location and time) |
 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
1131mm
|
Easier to fit in smaller spaces |
| General |
Polk Audio Signature Elite ES60 |
KEF Q750 |
| Brand |
Polk Audio |
KEF |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
50-300 watts |
15-150 watts |
| Sensitivity |
90 dB |
88 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
3.8 ohms |
| Frequency Response |
32-40k Hz |
48-28k Hz |
Drivers |
|
|
| Woofer Quantity |
3 |
2 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
Mica-reinforced polypropylene |
Aluminum |
| Woofer Surround Material |
Butyl rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Soft-Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2500Hz |
2500Hz |
| Firing Direction |
bottom |
front |
Physical Specs |
|
|
| Height |
1131.0mm (44.5") |
945.0mm (37.2") |
| Width |
216.0mm (8.5") |
328.0mm (12.9") |
| Depth |
401.0mm (15.8") |
315.0mm (12.4") |
| Weight |
23.60kg (51.9lbs) |
16.59kg (36.5lbs) |
| Enclosure |
Bass Reflex |
Passive Radiator |
| Finish |
MDF, Wood-grain vinyl |
MDF/Wood-grain vinyl |
| Available Colors |
Black |
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 |