In this review, we will be comparing MilleniaSub and KUBE 8b, two Powered Subwoofer speakers from Paradigm 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 Paradigm MilleniaSub 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.
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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 Paradigm MilleniaSuband KEF KUBE 8b have a single woofer setup however the Paradigm MilleniaSub's woofer is -inch whereas the KEF KUBE 8b features a 8-inch woofer.
Frequency Response
MilleniaSub has a frequency range of 24-150 Hz whereas KUBE 8b has a frequency range of 34-140 Hz. With a minimum frequency of 24Hz, the MilleniaSub 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
Both Paradigm MilleniaSub and KEF KUBE 8b 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
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 Paradigm MilleniaSub's and KEF KUBE 8b's external dimensions. Paradigm MilleniaSub has external dimensions of 386.0 x 180.0 x 467.0mm (15-3/16inch x 7-1/16inch x 18-3/8inch) 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 92mm shorter and 128mm less deeper than Paradigm MilleniaSub but it is also 116mm wider.
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 Paradigm MilleniaSub is approximately 840.6cm2 / 130.3inch2 and base area of the KEF KUBE 8b is approximately 1003.4cm2 / 155.5inch2. The MilleniaSub requires 16% 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 Paradigm MilleniaSub weighs 10.91kg / 24lbs and the KEF KUBE 8b weighs 11.36kg / 25lbs. This makes the KUBE 8b 4% heavier than the MilleniaSub.
Here is a comparison of how MilleniaSub 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 Paradigm MilleniaSub?
Here are the items that are included inside the box of MilleniaSub:
- Powered subwoofer
- 6-feet AC power cord
- Stand
- 4 Feet
- 4 Locking collars
- 4 Felt-pads
- 2 Screws
- 4 Rubber inserts
- Owners Manual
- Important Operating Info
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
 Low Frequency Response |
24 Hz
vs
34 Hz
|
Generates deeper bass |
 High Frequency Response |
150k Hz
vs
140k Hz
|
Generates higher frequency |
 Base Surface Area |
840cm2
vs
1003cm2
|
Takes less floor space |
| Woofer Size |
8 inches
vs
inches
|
Larger woofer |
 Height |
294mm
vs
386mm
|
Easier to fit in smaller spaces |
 Price per pair* |
600USD
vs
1699USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Paradigm MilleniaSub |
KEF KUBE 8b |
| Brand |
Paradigm |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
300 watts |
300 watts |
| Frequency Response |
24-150 Hz |
34-140 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
300-watt RMS |
300-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
" |
8" |
| Woofer Composition |
Reinforced Polymer |
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
40-140 Hz |
| Firing Direction |
front and back |
front |
Physical Specs |
|
|
| Height |
386.0mm (15.2") |
294.0mm (11.6") |
| Width |
180.0mm (7.1") |
296.0mm (11.7") |
| Depth |
467.0mm (18.4") |
339.0mm (13.3") |
| Weight |
10.91kg (24lbs) |
11.36kg (25lbs) |
| Enclosure |
Acoustic Suspension |
Acoustic Suspension |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
3 Years |
2 Years |
| Labor Warranty |
3 Years |
2 Years |