In this review, we will be comparing Q Acoustics 5020 and Q150, two Passive Bookshelf speakers from Q Acoustics and KEF. Let's have a brief look at the main features
of Q Acoustics 5020 and KEF Q150 first before getting into our more
detailed comparison.
What size room are the Q Acoustics 5020 and KEF Q150 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 Q Acoustics 5020 and KEF Q150 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 Q Acoustics 5020 and Q150 are 2-way speakers.
| Driver |
Q Acoustics 5020 |
KEF Q150 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5-inch
|
1 x 5.25-inch
|
Q Acoustics 5020 features a 1" Soft-dome Tweeter and 1 x 5" Continuous Curved Cone Woofer with a Crossover frequency at 2500 Hz. On the other hand, the Q150 features a 1" vented aluminum Dome Tweeter and 1 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
Q Acoustics 5020 has a frequency range of 53-30k Hz whereas Q150 has a frequency range of 51-28k Hz. With a minimum frequency of 51Hz, the Q150 can go slightly deeper then the Q Acoustics 5020's min frequency of 53Hz.
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 Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf 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
Q Acoustics 5020 is a 6 ohms speaker compared to the Q150 which has a nominal impedance of 8 ohms.
These two speakers also have different sensitivity levels. Q Acoustics 5020 sensitivity is rated at 87.9 dB and the Q150's is rated at 86 dB. This 2 dB difference makes the Q Acoustics 5020 a more sensitive speaker compared to KEF Q150, hence will play louder with the same amount of watts.
Sensitivity
Bookshelf 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.
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
Q Acoustics 5020 features Post type posts and Q150 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
Q Acoustics 5020's Binding post terminals
KEF Q150's Post terminals
Cabinet Type and Port Position
Both Q Acoustics 5020 and Q150 have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.
If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.
KEF Q150 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 Q Acoustics 5020's and KEF Q150's external dimensions. Q Acoustics 5020 has external dimensions of 286.0 x 181.0 x 293.0mm ( 11-1/4nch x 7-1/8inch x 11-1/2inch ) whereas KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm ( 11.9 x 7.0 x 10.9inch) .
KEF Q150 is 1mm narrower and 15mm less deeper than Q Acoustics 5020 but it is also 17mm 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 Q Acoustics 5020 is approximately 530.3cm2 / 82.2inch2 and base area of the KEF Q150 is approximately 500.4cm2 / 77.6inch2. The Q Acoustics 5020 requires 6% more surface area than the Q150 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 Q Acoustics 5020 weighs 7.00kg / 15.4lbs and the KEF Q150 weighs 5.60kg / 12.3lbs. This makes the Q Acoustics 5020 25% heavier than the Q150.
Here is a comparison of how Q Acoustics 5020 and Q150's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Q Acoustics 5020?
Here are the items that are included inside the box of Q Acoustics 5020:
2x 5020 loudspeaker 1x Owners manual 2x Foam bung
What's in the Box of KEF Q150?
Here are the items that come with the Q150:
2 Bookshelf loudspeakers 2 Foam port plugs 8 Self-adhesive rubber feet Owner's Manual Warranty Registration Card
 Sensitivity |
88 dB
vs
86 dB
|
Play louder with same amount of amplification power |
 High Frequency Response |
30k Hz
vs
28k Hz
|
Generates higher frequency |
 Height |
286mm
vs
303mm
|
Easier to fit in smaller spaces |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 Minimum Impedance |
3.7 ohms
vs
3.3 ohms
|
Very low impedance levels puts more pressure on amplifier |
 Woofer Size |
5.25 inches
vs
5 inches
|
Larger woofer |
| Low Frequency Response |
51 Hz
vs
53 Hz
|
Generates deeper bass |
 Base Surface Area |
500cm2 (180x278mm)
vs
530cm2 (181x293mm)
|
Takes less floor space |
 Price per pair* |
600USD
vs
899USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Q Acoustics 5020 |
KEF Q150 |
| Brand |
Q Acoustics |
KEF |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
25-100 watts |
10-100 watts |
| Sensitivity |
87.9 dB |
86 dB |
| Impedance |
6 ohms |
8 ohms |
| Impedance |
3.3 ohms |
3.7 ohms |
| Frequency Response |
53-30k Hz |
51-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5" |
5.25" |
| Woofer Composition |
Continuous Curved Cone |
Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Soft-dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2500 Hz |
2500Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
286.0mm (11.3") |
303.0mm (11.9") |
| Width |
181.0mm (7.1") |
180.0mm (7.1") |
| Depth |
293.0mm (11.5") |
278.0mm (10.9") |
| Weight |
7.00kg (15.4lbs) |
5.60kg (12.3lbs) |
| Enclosure |
Bass Relfex |
Bass Reflex |
| Finish |
MDF |
MDF/Vinyl-wrapped |
| Available Colors |
Holme Oak,Satin Black,Satin White,Santos Rosewood |
Black, Walnut, White |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
n/a |
18-24" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
5 years |
5 Years |
| Labor Warranty |
5 years |
5 Years |