In this review, we will be comparing 3060S and KUBE 8b, 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 3060S and KEF KUBE 8b 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 3060S and KEF KUBE 8b compare and hopefully end up with enough arguments to decide which one of these subwoofers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Q Acoustics 3060Sand KEF KUBE 8b have the same driver set up: Both subwoofers have 1 x 8" drivers.
Frequency Response
3060S has a frequency range of 35-250 Hz whereas KUBE 8b has a frequency range of 34-140 Hz. With a minimum frequency of 34Hz, the KUBE 8b can go slightly deeper then the 3060S's min frequency of 35Hz.
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 3060S has a Infinite Baffle type cabinet. On the other hand the KEF KUBE 8b 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 3060S's and KEF KUBE 8b's external dimensions. Q Acoustics 3060S has external dimensions of 324.0 x 480.0 x 155.0mm ( 12-3/4 x 18-7/8 x 6-1/8inch) whereas KEF KUBE 8b has external dimensions of 294.0 x 296.0 x 339.0mm ( 11-9/16 x 11-5/8 x 13-5/16inch) .
KEF KUBE 8b is 184mm narrower and 30mm shorter than Q Acoustics 3060S but it is also 184mm deeper.
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 3060S is approximately 744.0cm2 / 115.3inch2 and base area of the KEF KUBE 8b is approximately 1003.4cm2 / 155.5inch2. The 3060S requires 26% less surface area than the KUBE 8b which gives it a small advantage 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 3060S weighs 8.50kg / 18.7lbs and the KEF KUBE 8b weighs 11.36kg / 25lbs. This makes the KUBE 8b 34% heavier than the 3060S.
Here is a comparison of how 3060S and KUBE 8b's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 High Frequency Response |
250k Hz
vs
140k Hz
|
Generates higher frequency |
 Base Surface Area |
744cm2
vs
1003cm2
|
Takes less floor space |
 Price per pair* |
299USD
vs
600USD
|
costs less (*prices may change depending on the seller, location and time) |
 Low Frequency Response |
34 Hz
vs
35 Hz
|
Generates deeper bass |
 Height |
294mm
vs
324mm
|
Easier to fit in smaller spaces |
| General |
Q Acoustics 3060S |
KEF KUBE 8b |
| Brand |
Q Acoustics |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
150 watts |
300 watts |
| Frequency Response |
35-250 Hz |
34-140 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
150-watt RMS |
300-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
8" |
8" |
| 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 |
324.0mm (12.8") |
294.0mm (11.6") |
| Width |
480.0mm (18.9") |
296.0mm (11.7") |
| Depth |
155.0mm (6.1") |
339.0mm (13.3") |
| Weight |
8.50kg (18.7lbs) |
11.36kg (25lbs) |
| 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 |