In this review, we will be comparing KUBE 10b and SUB8, two Powered Subwoofer speakers from KEF and Kanto. 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 KEF KUBE 10b and Kanto SUB8 first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the KEF KUBE 10b and Kanto SUB8 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 KEF KUBE 10band Kanto SUB8 have a single woofer setup however the KEF KUBE 10b's woofer is 10-inch whereas the Kanto SUB8 features a 8-inch woofer.
Frequency Response
KUBE 10b has a frequency range of 24-140 Hz whereas SUB8 has a frequency range of 35-175 Hz. With a minimum frequency of 24Hz, the KUBE 10b can go significantly deeper on the low side and provide stronger bass compared to the SUB8'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
Both KEF KUBE 10b and Kanto SUB8 have Acoustic Suspension type cabinets. 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 KEF KUBE 10b's and Kanto SUB8's external dimensions. KEF KUBE 10b has external dimensions of 372.0 x 356.0 x 397.0mm ( 14-5/8 x 14 x 15-5/8inch) whereas Kanto SUB8 has external dimensions of 301.0 x 281.0 x 329.0mm ( 11-13/16 x 11-1/16 x 12-15/16inch) .
KEF KUBE 10b is clearly the larger of the two speakers. Its body is 75mm wider, 71mm taller and 68mm deeper than Kanto SUB8.
Below you can see the front view size comparison of KEF KUBE 10b and Kanto SUB8 in scale.
Comparison image of KEF KUBE 10b and Kanto SUB8 Size and External Dimensions
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 KUBE 10b is approximately 1413.3cm2 / 219.1inch2 and base area of the Kanto SUB8 is approximately 924.5cm2 / 143.3inch2. The KUBE 10b requires 53% more surface area than the SUB8 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 KEF KUBE 10b weighs 17.50kg / 38.5lbs and the Kanto SUB8 weighs 7.82kg / 17.2lbs. This makes the KUBE 10b 124% heavier than the SUB8.
Here is a comparison of how KUBE 10b and SUB8's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of KEF KUBE 10b?
Here are the items that are included inside the box of KUBE 10b:
Powered subwoofer6.5-feet AC power cordSpeaker-level input blockUser ManualImportant Safety InformationWarranty Information
What's in the Box of Kanto SUB8?
Here are the items that come with the SUB8:
Powered subwoofer6-feet AC power cord9.75-feet mono-RCA cableUser Manual
 Woofer Size |
10 inches
vs
8 inches
|
Larger woofer |
| Low Frequency Response |
24 Hz
vs
35 Hz
|
Generates deeper bass |
 Wireless Operation |
Optional
vs
No
|
Connect your subwoofer to your system wireless |
 High Frequency Response |
175k Hz
vs
140k Hz
|
Generates higher frequency |
 Height |
301mm
vs
372mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
924cm2 (281x329mm)
vs
1413cm2 (356x397mm)
|
Takes less floor space |
 Price per pair* |
300USD
vs
750USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
KEF KUBE 10b |
Kanto SUB8 |
| Brand |
KEF |
Kanto |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
300 watts |
125 watts |
| Frequency Response |
24-140 Hz |
35-175 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
300-watt RMS |
125-watt RMS |
| Watts Peak (Max) |
n/a |
250-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
10" |
8" |
| Woofer Composition |
Not given |
Paper |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
40-140 Hz |
n/a |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
372.0mm (14.6") |
301.0mm (11.9") |
| Width |
356.0mm (14") |
281.0mm (11.1") |
| Depth |
397.0mm (15.6") |
329.0mm (13") |
| Weight |
17.50kg (38.5lbs) |
7.82kg (17.2lbs) |
| Enclosure |
Acoustic Suspension |
Acoustic Suspension |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
2 Years |
| Labor Warranty |
2 Years |
2 Years |