SpeakerDecision
  • SPEAKERS by TYPE
    • Passive Bookshelf Speakers
    • Passive Floor-standing Speakers
    • Passive Center Channel Speakers
    • Passive In-wall Speakers
    • All Passive Speakers
    • Powered Subwoofers
    • Powered Stereo Speakers
  • AMPLIFIERS
  • SMART FIND
KEF KUBE 10b vs Definitive Technology SuperCube 4000 Comparison
x
Subwoofer to replace
Change

KEF KUBE 10b

Powered Subwoofer | 24-140 Hz

KEF KUBE 10b
CHECK PRICE
Change
    
DT SuperCube 4000

Powered Subwoofer | 16-200 Hz

Definitive Technology SuperCube 4000
CHECK PRICE
KEF KUBE 10b KEF KUBE 10b
See at AMAZON
DT SuperCube 4000 DT SuperCube 4000
See at AMAZON
KEF KUBE 10b
See at AMAZON
DT SuperCube 4000
See at AMAZON
KEF KUBE 10b vs DT SuperCube 4000 Speaker Comparison

In this review, we will be comparing KUBE 10b and SuperCube 4000, two Powered Subwoofer speakers from KEF and Definitive Technology. 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 DT SuperCube 4000 first before getting into our more detailed comparison.

KEF KUBE 10b Key Specs

  • 10" Not given Woofer
  • 24-140 Hz Frequency Response
  • 300 watts Max Amplifier Output
  • Weight:17.50kg
  • Dimensions (H x W x D): 372.0" x 14" x 15-5/8"( 372.0 x 356.0 x 397.0mm )

DT SuperCube 4000 Key Specs

  • 8" Not given Woofer
  • 16-200 Hz Frequency Response
  • 1200 watts Max Amplifier Output
  • Weight:11.36kg
  • Dimensions (H x W x D): 302.0" x 11-1/16" x 12-1/2"( 302.0 x 281.0 x 318.0mm )

In the following sections, we will get into details in order to better understand how the KEF KUBE 10b and DT SuperCube 4000 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.Both KEF KUBE 10band DT SuperCube 4000 have a single woofer setup however the KEF KUBE 10b's woofer is 10-inch whereas the DT SuperCube 4000 features a 8-inch woofer.

Frequency Response

KUBE 10b has a frequency range of 24-140 Hz whereas SuperCube 4000 has a frequency range of 16-200 Hz. With a minimum frequency of 16Hz, the SuperCube 4000 can go significantly deeper on the low side and provide stronger bass compared to the KUBE 10b's min frequency of 24Hz.

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

KEF KUBE 10b
DT SuperCube 4000
Min
Average
Max
High Frequency

Subwoofer Speakers

KEF KUBE 10b
DT SuperCube 4000
Min
Average
Max

Cabinet Type

The KEF KUBE 10b has a Acoustic Suspension type cabinet. 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. On the other hand the DT SuperCube 4000 have Passive Radiator type enclosure. 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.

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 DT SuperCube 4000'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 DT SuperCube 4000 has external dimensions of 302.0 x 281.0 x 318.0mm ( 11-7/8 x 11-1/16 x 12-1/2inch) .

KEF KUBE 10b is clearly the larger of the two speakers. Its body is 75mm wider, 70mm taller and 79mm deeper than DT SuperCube 4000.

Below you can see the front view size comparison of KEF KUBE 10b and DT SuperCube 4000 in scale.

KEF KUBE 10b vs DT SuperCube 4000 Size Comparison - Front View
Comparison image of KEF KUBE 10b and DT SuperCube 4000 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 DT SuperCube 4000 is approximately 893.6cm2 / 138.5inch2. The KUBE 10b requires 58% more surface area than the SuperCube 4000 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 DT SuperCube 4000 weighs 11.36kg / 25lbs. This makes the KUBE 10b 54% heavier than the SuperCube 4000.

Here is a comparison of how KUBE 10b and SuperCube 4000's weights compare with the average, max and min weights in Powered Subwoofer class.

Weight
All Subwoofer Speakers
KEF KUBE 10b
DT SuperCube 4000
Min
Average
Max

What's in the Box of KEF KUBE 10b?

Here are the items that are included inside the box of KUBE 10b:
  • Powered subwoofer
  • 6.5-feet AC power cord
  • Speaker-level input block
  • User Manual
  • Important Safety Information
  • Warranty Information
  • What's in the Box of DT SuperCube 4000?

    Here are the items that come with the SuperCube 4000:
  • 8-inch Powered subwoofer
  • 7-feet AC power cord
  • Remote control (CR2025 battery installed)
  • 4 Threaded rubber-feet
  • 4 Spike feet (hex-nut attached)
  • Owners Manual
  • SC4000 Booklet

  • Reasons to choose KEF KUBE 10b over Definitive Technology SuperCube 4000
    Woofer Size 10 inches vs 8 inches Larger woofer
    Wireless Operation Optional vs No Connect your subwoofer to your system wireless
    Reasons to choose Definitive Technology SuperCube 4000 over KEF KUBE 10b
    Low Frequency Response 16 Hz vs 24 Hz Generates deeper bass
    High Frequency Response 200k Hz vs 140k Hz Generates higher frequency
    Height 302mm vs 372mm Easier to fit in smaller spaces
    Base Surface Area 893cm2 vs 1413cm2 Takes less floor space
    KEF KUBE 10b vs DT SuperCube 4000 Specs Table
    Detailed comparison of specifications
    General KEF KUBE 10b Definitive Technology SuperCube 4000
    Brand KEF Definitive Technology
    Speaker Type Powered Subwoofer Powered Subwoofer
    Max Amplifier Output 300 watts 1200 watts
    Frequency Response 24-140 Hz 16-200 Hz
    Amplifier
    Watts RMS (Continuous) 300-watt RMS 1200-watt RMS
    Drivers
    Woofer Quantity 1 1
    Woofer Size 10" 8"
    Woofer Composition Not given Not given
    Tweeter Size - -
    Aimable Tweeter No No
    Midrange Driver No No
    Crossover Frequency 40-140 Hz 40-150 Hz and 40-150 Hz
    Firing Direction front front
    Physical Specs
    Height 372.0mm (14.6") 302.0mm (11.9")
    Width 356.0mm (14") 281.0mm (11.1")
    Depth 397.0mm (15.6") 318.0mm (12.5")
    Weight 17.50kg (38.5lbs) 11.36kg (25lbs)
    Enclosure Acoustic Suspension Passive Radiator
    Moisture Resistancy No No
    Connections
    Other
    Parts Warranty 2 Years 3 Years
    Labor Warranty 2 Years 3 Years

    Latest Powered Subwoofers
    Polk Signature Elite ES12
    Polk Signature Elite ES12
    12-inch Woofer | 22-250 Hz | 300 watts
    Polk Signature Elite ES10
    Polk Signature Elite ES10
    10-inch Woofer | 28-250 Hz | 200 watts
    Polk Signature Elite ES8
    Polk Signature Elite ES8
    8-inch Woofer | 32-180 Hz | 100 watts
    JBL Stage 220P
    JBL Stage 220P
    12-inch Woofer | 29-150 Hz | 250 watts
    JBL Stage 200P
    JBL Stage 200P
    10-inch Woofer | 32-150 Hz | 150 watts
    KEF KC92
    KEF KC92
    9-inch Woofer | 11-200 Hz | 1000 watts
    KEF Kube 15 MIE
    KEF Kube 15 MIE
    15-inch Woofer | 20-140 Hz | 300 watts
    KEF Kube 12 MIE
    KEF Kube 12 MIE
    12-inch Woofer | 22-140 Hz | 300 watts
    KEF Kube 10 MIE
    KEF Kube 10 MIE
    10-inch Woofer | 20-140 Hz | 300 watts
    KEF Kube 8 MIE
    KEF Kube 8 MIE
    8-inch Woofer | 34-140 Hz | 300 watts

    Copyright © 2025 by SpeakerDecision
    About Privacy Contact US Camera Decision

    Report a Correction