In this review, we will be comparing Q950 and Q550, two Passive Floor-standing speakers by KEF Let's have a brief look at the main features
of KEF Q950 and KEF Q550 first before getting into our more
detailed comparison.
Q950 and Q550 are members of KEF's Q series of speakers. Below you can find the loudspeakers from this series.
What size room are the KEF Q950 and KEF Q550 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 Q950 and KEF Q550 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 Q950 and Q550 are 2-way speakers. Q950 features a 1.5" vented aluminum Dome Tweeter and 2 x 8.0" Aluminum Woofer with a Crossover frequency at 2200Hz. On the other hand, the Q550 features a 1" vented aluminum Dome Tweeter and 2 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
Q950 has a frequency range of 44-28k Hz whereas Q550 has a frequency range of 58-28k Hz. With a minimum frequency of 44Hz, the Q950 can go significantly deeper on the low side and provide stronger bass compared to the Q550'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
Q950 and Q550 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Q950 sensitivity is rated at 91 dB and the Q550's is at 87 dB. This 4 dB difference makes the KEF Q950 a more sensitive speaker compared to KEF Q550, 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.
Q950 can handle a max power of 200 watts RMS from the amp the whereas Q550 has a max power handling value of 130 watts RMS, 70 watts less than the Q950.
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
Q950 features Binding post type posts and Q550 has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Both Q950 and Q550 have front firing ports. front ported speakers offers more flexibility in placement in regards to proximity to walls&surfaces compared to rear ported speakers.
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 Q950's and KEF Q550's external dimensions. KEF Q950 has external dimensions of 1117.0 x 362.0 x 315.0mm ( 43-15/16 x 14-1/4 x 12-3/8inch) whereas KEF Q550 has external dimensions of 894.0 x 296.0 x 313.0mm ( 35-3/16 x 11-5/8 x 12-5/16inch) .
KEF Q950 is clearly the larger of the two speakers. Its body is 66mm wider, 223mm taller and 2mm deeper than KEF Q550.
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 Q950 is approximately 1140.3cm2 / 176.7inch2 and base area of the KEF Q550 is approximately 926.5cm2 / 143.6inch2. The Q950 requires 23% more surface area than the Q550 which gives it a small disadvantage 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 Q950 weighs 20.68kg / 45.5lbs and the KEF Q550 weighs 14.55kg / 32lbs. This makes the Q950 42% heavier than the Q550.
Here is a comparison of how Q950 and Q550'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 Q950?
Here are the items that are included inside the box of Q950:
Floorstanding loudspeaker2 Outrigger feet4 Spikes6 Screws6 Washers4 Rubber insertsHex-keyOwners ManualWarranty Information
What's in the Box of KEF Q550?
Here are the items that come with the Q550:
Floorstanding loudspeaker2 Outrigger feet4 Spikes6 Screws6 Washers4 Rubber insertsHex-keyOwners ManualWarranty Information
 Max Input Power |
200 watts
vs
130 watts
|
Handle more power from your amplifier |
 Sensitivity |
91 dB
vs
87 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
8.0 inches
vs
5.25 inches
|
Larger woofer |
| Low Frequency Response |
44 Hz
vs
58 Hz
|
Generates deeper bass |
 Minimum Impedance |
3.5 ohms
vs
3.2 ohms
|
Very low impedance levels puts more pressure on amplifier |
 Height |
894mm
vs
1117mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
926cm2 (296x313mm)
vs
1140cm2 (362x315mm)
|
Takes less floor space |
 Price per pair* |
1400USD
vs
2200USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
KEF Q950 |
KEF Q550 |
| Brand |
KEF |
KEF |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
15-200 watts |
15-130 watts |
| Sensitivity |
91 dB |
87 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
3.2 ohms |
3.5 ohms |
| Frequency Response |
44-28k Hz |
58-28k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
8.0" |
5.25" |
| Woofer Composition |
Aluminum |
Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1.5" |
1" |
| Tweeter Type |
Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2200Hz |
2500Hz |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
1117.0mm (44") |
894.0mm (35.2") |
| Width |
362.0mm (14.3") |
296.0mm (11.7") |
| Depth |
315.0mm (12.4") |
313.0mm (12.3") |
| Weight |
20.68kg (45.5lbs) |
14.55kg (32lbs) |
| Enclosure |
Passive Radiator |
Passive Radiator |
| Finish |
MDF/Wood-grain vinyl |
MDF/Wood-grain vinyl |
| Available Colors |
Walnut |
Walnut |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |