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KEF KUBE 8b vs Jamo S 808 SUB Comparison
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Subwoofer to replace
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KEF KUBE 8b

Powered Subwoofer | 34-140 Hz

KEF KUBE 8b
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Jamo S 808 SUB

Powered Subwoofer | 39-180 Hz

Jamo S 808 SUB
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KEF KUBE 8b KEF KUBE 8b
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Jamo S 808 SUB Jamo S 808 SUB
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KEF KUBE 8b
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Jamo S 808 SUB
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KEF KUBE 8b vs Jamo S 808 SUB Speaker Comparison

In this review, we will be comparing KUBE 8b and S 808 SUB, two Powered Subwoofer speakers from KEF and Jamo. 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 8b and Jamo S 808 SUB first before getting into our more detailed comparison.

KEF KUBE 8b Key Specs

  • 8" Not given Woofer
  • 34-140 Hz Frequency Response
  • 300 watts Max Amplifier Output
  • Weight:11.36kg
  • Dimensions (H x W x D): 294.0" x 11-5/8" x 13-5/16"( 294.0 x 296.0 x 339.0mm )

Jamo S 808 SUB Key Specs

  • 8" Polyfiber Woofer
  • 39-180 Hz Frequency Response
  • 50 watts Max Amplifier Output
  • Weight:8.64kg
  • Dimensions (H x W x D): 459.0" x 7" x 14"( 459.0 x 178.0 x 356.0mm )

In the following sections, we will get into details in order to better understand how the KEF KUBE 8b and Jamo S 808 SUB 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.KEF KUBE 8band Jamo S 808 SUB have the same driver set up: Both subwoofers have 1 x 8" drivers.

Frequency Response

KUBE 8b has a frequency range of 34-140 Hz whereas S 808 SUB has a frequency range of 39-180 Hz. With a minimum frequency of 34Hz, the KUBE 8b can go significantly deeper on the low side and provide stronger bass compared to the S 808 SUB's min frequency of 39Hz.

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 8b
Jamo S 808 SUB
Min
Average
Max
High Frequency

Subwoofer Speakers

KEF KUBE 8b
Jamo S 808 SUB
Min
Average
Max

Cabinet Type

The KEF KUBE 8b 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 Jamo S 808 SUB have Bass Reflex type enclosure. Bass Reflex type subwoofers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the 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 8b's and Jamo S 808 SUB's external dimensions. 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) whereas Jamo S 808 SUB has external dimensions of 459.0 x 178.0 x 356.0mm ( 18-1/16 x 7 x 14inch) .

KEF KUBE 8b is 165mm shorter and 17mm less deeper than Jamo S 808 SUB but it is also 118mm wider.

Below you can see the front view size comparison of KEF KUBE 8b and Jamo S 808 SUB in scale.

KEF KUBE 8b vs Jamo S 808 SUB Size Comparison - Front View
Comparison image of KEF KUBE 8b and Jamo S 808 SUB 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 8b is approximately 1003.4cm2 / 155.5inch2 and base area of the Jamo S 808 SUB is approximately 633.7cm2 / 98.2inch2. The KUBE 8b requires 58% more surface area than the S 808 SUB 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 8b weighs 11.36kg / 25lbs and the Jamo S 808 SUB weighs 8.64kg / 19lbs. This makes the KUBE 8b 31% heavier than the S 808 SUB.

Here is a comparison of how KUBE 8b and S 808 SUB's weights compare with the average, max and min weights in Powered Subwoofer class.

Weight
All Subwoofer Speakers
KEF KUBE 8b
Jamo S 808 SUB
Min
Average
Max

What's in the Box of KEF KUBE 8b?

Here are the items that are included inside the box of KUBE 8b:
  • 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 Jamo S 808 SUB?

    Here are the items that come with the S 808 SUB:
  • Powered subwoofer
  • Grille
  • 5-feet AC power cord
  • 6.5-feet Mono-RCA cable
  • 4 Rubber feet
  • User Manual
  • Important Safety Instructions
  • Warranty Information

  • Reasons to choose KEF KUBE 8b over Jamo S 808 SUB
    Low Frequency Response 34 Hz vs 39 Hz Generates deeper bass
    Height 294mm vs 459mm Easier to fit in smaller spaces
    Reasons to choose Jamo S 808 SUB over KEF KUBE 8b
    High Frequency Response 180k Hz vs 140k Hz Generates higher frequency
    Base Surface Area 633cm2 vs 1003cm2 Takes less floor space
    Price per pair* 149USD vs 600USD costs less (*prices may change depending on the seller, location and time)
    KEF KUBE 8b vs Jamo S 808 SUB Specs Table
    Detailed comparison of specifications
    General KEF KUBE 8b Jamo S 808 SUB
    Brand KEF Jamo
    Speaker Type Powered Subwoofer Powered Subwoofer
    Max Amplifier Output 300 watts 50 watts
    Frequency Response 34-140 Hz 39-180 Hz
    Amplifier
    Watts RMS (Continuous) 300-watt RMS 50-watt RMS
    Watts Peak (Max) n/a 100-watt RMS
    Drivers
    Woofer Quantity 1 1
    Woofer Size 8" 8"
    Woofer Composition Not given Polyfiber
    Tweeter Size - -
    Aimable Tweeter No No
    Midrange Driver No No
    Crossover Frequency 40-140 Hz n/a
    Firing Direction front Side
    Physical Specs
    Height 294.0mm (11.6") 459.0mm (18.1")
    Width 296.0mm (11.7") 178.0mm (7")
    Depth 339.0mm (13.3") 356.0mm (14")
    Weight 11.36kg (25lbs) 8.64kg (19lbs)
    Enclosure Acoustic Suspension Bass Reflex
    Grille n/a Yes
    Moisture Resistancy No No
    Connections
    Other
    Parts Warranty 2 Years 2 Years
    Labor Warranty 2 Years 2 Years

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