In this review, we will be comparing Q SUB120 and KUBE 10b, two Powered Subwoofer speakers from Q Acoustics and KEF. Being Powered subwoofers, they both have built-in amplifiers so you don't need an external power amp or an integrated amp to power them. Let's have a brief look at the main features of Q Acoustics Q SUB120 and KEF KUBE 10b first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the Q Acoustics Q SUB120 and KEF KUBE 10b compare and hopefully end up with enough arguments to decide which one of these subwoofers is the better choice for you.
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Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both Q Acoustics Q SUB120and KEF KUBE 10b have a single woofer setup however the Q Acoustics Q SUB120's woofer is 12-inch whereas the KEF KUBE 10b features a 10-inch woofer.
Frequency Response
Q SUB120 has a frequency range of 28-250 Hz whereas KUBE 10b has a frequency range of 24-140 Hz. With a minimum frequency of 24Hz, the KUBE 10b can go slightly deeper then the Q SUB120's min frequency of 28Hz.
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 Subwoofer class in our database.
Low Frequency
Subwoofer Speakers
High Frequency
Subwoofer Speakers
Cabinet Type
The Q Acoustics Q SUB120 has a Infinite Baffle type cabinet. On the other hand the KEF KUBE 10b have Acoustic Suspension type enclosure. Acoustic Suspension aka Sealed type subwoofers have enclosures that are sealed hence no ports or holes exists on the cabinet. Sealed designs helps to provide more accurate and tight bass responses compared to ported designs.
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 Q SUB120's and KEF KUBE 10b's external dimensions. Q Acoustics Q SUB120 has external dimensions of 400.0 x 400.0 x 432.0mm ( 15-3/4 x 15-3/4 x 17inch) whereas KEF KUBE 10b has external dimensions of 372.0 x 356.0 x 397.0mm ( 14-5/8 x 14 x 15-5/8inch) .
Q Acoustics Q SUB120 is clearly the larger of the two speakers. Its body is 44mm wider, 28mm taller and 35mm deeper than KEF KUBE 10b.
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 Q SUB120 is approximately 1728.0cm2 / 267.8inch2 and base area of the KEF KUBE 10b is approximately 1413.3cm2 / 219.1inch2. The Q SUB120 requires 22% more surface area than the KUBE 10b which gives it a small disadvantage on placement in tight spaces.
Weight Comparison The weight of a subwoofer may become an important factor if you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. The Q Acoustics Q SUB120 weighs 22.50kg / 49.5lbs and the KEF KUBE 10b weighs 17.50kg / 38.5lbs. This makes the Q SUB120 29% heavier than the KUBE 10b.
Here is a comparison of how Q SUB120 and KUBE 10b's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Woofer Size |
12 inches
vs
10 inches
|
Larger woofer |
 High Frequency Response |
250k Hz
vs
140k Hz
|
Generates higher frequency |
| Low Frequency Response |
24 Hz
vs
28 Hz
|
Generates deeper bass |
 Height |
372mm
vs
400mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1413cm2
vs
1728cm2
|
Takes less floor space |
 Price per pair* |
750USD
vs
799USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Q Acoustics Q SUB120 |
KEF KUBE 10b |
| Brand |
Q Acoustics |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
300 watts |
300 watts |
| Frequency Response |
28-250 Hz |
24-140 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
300-watt RMS |
300-watt RMS |
| Watts Peak (Max) |
600-watt RMS |
n/a |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
12" |
10" |
| Woofer Composition |
Paper composite |
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
40-140 Hz |
| Firing Direction |
n/a |
front |
Physical Specs |
|
|
| Height |
400.0mm (15.7") |
372.0mm (14.6") |
| Width |
400.0mm (15.7") |
356.0mm (14") |
| Depth |
432.0mm (17") |
397.0mm (15.6") |
| Weight |
22.50kg (49.5lbs) |
17.50kg (38.5lbs) |
| Enclosure |
Infinite Baffle |
Acoustic Suspension |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
5 Years |
2 Years |
| Labor Warranty |
5 Years |
2 Years |