In this review, we will be comparing Bronze W10 and KUBE 8b, two Powered Subwoofer speakers from Monitor Audio 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 Monitor Audio Bronze W10 and KEF KUBE 8b first before getting into our more detailed comparison.
The sections below take each area in turn: driver and amplifier, frequency response, physical size and connectivity.
**This post contains affiliate links, and we will be compensated if you make a purchase after clicking through our 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.Both Monitor Audio Bronze W10and KEF KUBE 8b have a single woofer setup however the Monitor Audio Bronze W10's woofer is 10-inch whereas the KEF KUBE 8b features a 8-inch woofer.
Frequency Response
Bronze W10 has a frequency range of 29-150 Hz whereas KUBE 8b has a frequency range of 34-140 Hz. With a minimum frequency of 29Hz, the Bronze W10 can go significantly deeper on the low side and provide stronger bass compared to the KUBE 8b's min frequency of 34Hz.
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 Monitor Audio Bronze W10 has a Passive Radiator type cabinet. Passive Radiator type subwoofers sports a non-powered cone that moves in response to the main woofer to move air out in order to generate stronger bass in a smaller body compared to ported or sealed designs. 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
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Monitor Audio Bronze W10's and KEF KUBE 8b's external dimensions. Monitor Audio Bronze W10 has external dimensions of 361.0 x 321.0 x 405.0mm (14-3/16 x 12-5/8 x 15-15/16inch) 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).
Monitor Audio Bronze W10 is clearly the larger of the two speakers. Its body is 25mm wider, 67mm taller and 66mm deeper than KEF KUBE 8b.
Below you can see the front view size comparison of Monitor Audio Bronze W10 and KEF KUBE 8b in scale.
Comparison image of Monitor Audio Bronze W10 and KEF KUBE 8b 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 Monitor Audio Bronze W10 is approximately 1300.1cm2 / 201.5inch2 and base area of the KEF KUBE 8b is approximately 1003.4cm2 / 155.5inch2. The Bronze W10 requires 30% more surface area than the KUBE 8b 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 Monitor Audio Bronze W10 weighs 13.44kg / 29.6lbs and the KEF KUBE 8b weighs 11.36kg / 25lbs. This makes the Bronze W10 18% heavier than the KUBE 8b.
Here is a comparison of how Bronze W10 and KUBE 8b's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of Monitor Audio Bronze W10?
Here are the items that are included inside the box of Bronze W10:
- Powered subwoofer
- Grille
- 6.5-feet AC power cord
- 10-feet Mono-minijack cable
- 4 Rubber feet
- Quick Start Guide
- Important Safety Instructions
What's in the Box of KEF KUBE 8b?
Here are the items that come with the KUBE 8b:
- Powered subwoofer
- 6.5-feet AC power cord
- Speaker-level input block
- User Manual
- Important Safety Information
- Warranty Information
 Woofer Size |
10 inches
vs
8 inches
|
Larger woofer |
| Low Frequency Response |
29 Hz
vs
34 Hz
|
Generates deeper bass |
 High Frequency Response |
150k Hz
vs
140k Hz
|
Generates higher frequency |
 Height |
294mm
vs
361mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1003cm2
vs
1300cm2
|
Takes less floor space |
 Price per pair* |
600USD
vs
975USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Monitor Audio Bronze W10 |
KEF KUBE 8b |
| Brand |
Monitor Audio |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
220 watts |
300 watts |
| Frequency Response |
29-150 Hz |
34-140 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
220-watt RMS |
300-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
10" |
8" |
| Woofer Composition |
C-CAM |
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
40-140 Hz |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
361.0mm (14.2") |
294.0mm (11.6") |
| Width |
321.0mm (12.6") |
296.0mm (11.7") |
| Depth |
405.0mm (15.9") |
339.0mm (13.3") |
| Weight |
13.44kg (29.6lbs) |
11.36kg (25lbs) |
| Enclosure |
Passive Radiator |
Acoustic Suspension |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
5 Years |
2 Years |
| Labor Warranty |
5 Years |
2 Years |