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 Subwoofer Review

Main Features

  • 10" Not given Woofer
  • 300 watts RMS Output
  • 24-140 Hz Frequency Response
  • Built-in DSP with Room Correction
  • Weight: 38.50 lbs / 17.50kg
  • Dimensions (H x W x D): 14-5/8" x 14" x 15-5/8"
CHECK PRICE
CHECK PRICE

Compare To

x
Add a Subwoofer for comparison
KEF KUBE 10b Subwoofer Review
KEF KUBE 10b KEF KUBE 10b
See at AMAZON

KUBE 10b is a Sealed type Powered Subwoofer by KEF with a frequency range of 24-140 Hz. It features 1 x 10" Not given Woofer, and powered by a Class D 300 watts amplifier.

KUBE 10b is a member of KEF's KUBE series of Powered subwoofers. Below you can see the main specs of these subwoofers as well as review and comparison links.

KEF KUBE Series Subwoofers
Model Frequency Woofer Amp Power Weight
KEF KUBE 8b
Compare
34-140k Hz 8" 300 watts 11.36kg
KEF KUBE 10b
24-140k Hz 10" 300 watts 17.50kg
KEF KUBE 12b
Compare
22-140k Hz 12" 300 watts 20.68kg


**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.

Frequency Response

KEF KUBE 10b has a Frequency response range of 24-140 Hz at ±3dB. With the help of its 1 x 10-inch driver and 300 watts RMS amplifier, the KUBE 10b can go as low as 24 Hz which doesn't quite offer full range sound (20Hz-2kHZ) but it gets really close. Here we have a comparison of how KUBE 10b's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.

Low Frequency
Powered Subwoofers
KEF KUBE 10b
Min
Average
Max
High Frequency
Subwoofer Speakers
KEF KUBE 10b
Min
Average
Max

Among all subwoofers in our database with a max MSRP price of 750$, these are the 5 Powered Subwoofer models that can reach deeper bass levels than the KEF KUBE 10b's 24Hz:

  • GoldenEar ForceField 3 with Low Frequency of 18 Hz (Compare w/ KUBE 10b)
  • SVS PB-1000 with Low Frequency of 19 Hz (Compare w/ KUBE 10b)
  • SVS SB-2000 with Low Frequency of 19 Hz (Compare w/ KUBE 10b)
  • Klipsch RP-1000SW with Low Frequency of 19 Hz (Compare w/ KUBE 10b)
  • SVS SB-1000 Pro with Low Frequency of 20 Hz (Compare w/ KUBE 10b)

Low-Pass Crossover

KEF KUBE 10b has a variable Low-pass filter (LFP) which lets you choose a frequency level between 40-140 Hz in order to block any frequencies above that point from reaching the amplifier.

Inputs and Outputs

  • PreampLevel Inputs: Stereo RCA/LFE
  • SpeakerLevel Inputs: No
  • SpeakerLevel Outputs: No
  • Wireless: No

Wireless Connection

KEF KUBE 10b lets you make a wireless connection to your system with an optional adapter. Wireless connection helps to minimize the cables running on your floor.

KEF KUBE 10b External Dimensions and Weight

KEF KUBE 10b has external dimensions of (Height x Width x Depth) 14-5/8 x 14 x 15-5/8inch (372.0 x 356.0 x 397.0mm ).

Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base area of KEF KUBE 10b is approximately 1413.3cm2 / 219.1inch2.

To get a better perspective on the real life size of KEF KUBE 10b, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).

KEF KUBE 10b Real Life Body Size Comparison
KEF KUBE 10b Speaker Size Compared to a Compact Disc

Here we place the KEF KUBE 10b virtually next to a standard width amplifier and turntable on a media center to get a better idea about the size.

KEF KUBE 10b placed next to a Media Stand
KEF KUBE 10b Subwoofer next to a Media Stand

Weight

The KEF KUBE 10b weighs 17.50kg / 38.5lbs. Weight of a subwoofer is an important factor when you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. Here is a comparison of how KUBE 10b's weight compares with the average, max and min weights in its class.

Weight
All Subwoofer Speakers
KEF KUBE 10b
Min
Average
Max
Weight
Subwoofer Speakers under $750
KEF KUBE 10b
Min
Average
Max

Cabinet type and Materials

KEF KUBE 10b has a Acoustic Suspension type cabinet. Acoustic suspension aka Sealed subwoofers are preferred for music oriented systems whereas the Ported subwoofers are generally accepted to be more suitable for home theatre systems.

Port Position

KEF KUBE 10b is a front-firing port speaker , which gives you more flexibility compared to rear firing speakers when you need to place it close against a wall or other surfaces.

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
  • Recommended Accessories

    Here is a list of accessories that we think you may need for the KEF KUBE 10b.

    • Vibration Isolators: IsoAcoustics isolators more affordable options too.
    • Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.

    Warranty

    2 Years of parts warranty and 2 Years of labor warranty is generally provided by the manufacturer.

    KEF KUBE 10b Alternatives in Powered Subwoofer Speakers
    Model Frequency Woofer Amp Power Dimensions
    Polk Monitor XT12
    Compare
    24-160k Hz 12" 50 watts 16-7/16inch x 16-1/16inch x 19-1/16inch "
    B&W DB4S
    Compare
    10-350k Hz 10" 1000 watts 14-3/4 x 14-1/4 x 17-1/16inch"
    Klipsch R-101SW
    Compare
    30-160k Hz 10" 150 watts 14-9/16inch x 14-1/16inch x 20-13/16inch "
    Klipsch R-121SW
    Compare
    28-120k Hz 12" 200 watts 16-5/8inch x 16inch x 20-15/16inch "
    Klipsch RP-1200SW
    Compare
    17-138k Hz 12" 400 watts 18-15/16inch x 17inch x 25-15/16inch "
    SVS SB-1000 Pro
    Compare
    20-270k Hz 12" 325 watts 13-1/2inch x 13inch x 15-13/16inch "
    Wharfedale SW-15
    Compare
    30-120k Hz 15" 400 watts 22-7/16inch x 19-3/8inch x 24-3/16inch "
    KEF KUBE 8b
    Compare
    34-140k Hz 8" 300 watts 11-9/16 x 11-5/8 x 13-5/16inch"
    Klipsch SPL-100
    Compare
    27-125k Hz 10" 200 watts 16-7/16 x 14-1/16 x 18-13/16inch"
    JBL Stage A120P
    Compare
    32-150k Hz 12" 250 watts 16-5/16 x 15-7/16 x 18-11/16inch"
    KEF KC62
    Compare
    11-200k Hz 6.5" 1000 watts 9-5/8inch x 10-1/8inch x 11-1/16inch "
    SVS PB-1000
    Compare
    19-270k Hz 10" 300 watts 18-7/8 x 15 x 20-15/16inch"
    Klipsch RP-1400SW
    Compare
    16-141k Hz 14" 500 watts 21-5/16inch x 20inch x 25-11/16inch "
    B&W ASW610
    Compare
    27-140k Hz 10" 200 watts 12-5/8 x 12-1/4 x 15-1/2inch"
    Klipsch R-100SW
    Compare
    32-120k Hz 10" 150 watts 14-5/8 x 12-9/16 x 18-1/16inch"
    Klipsch R-112SW
    Compare
    24-125k Hz 12" 300 watts 17-3/8 x 15-3/8 x 20-15/16inch"
    Frequently Asked Questions about KEF KUBE 10b
    What is the External Dimensions of KEF KUBE 10b
    LATEST BLOG POSTS

    Klipsch La Scala AL6 and Klipschorn AK7 Speakers are Unveiled
    New Audiolab 6000A MkII with upgraded DAC and new HDMI ARC connection
    Q Acoustics 3000c Series Loudspeakers added to the database
    WiiM VibeLink Amp: A Game-Changer for Budget Hi-Fi in 2025
    KEF Meta and Reference Meta Floorstanding Speaker Size and Specs Comparison
    Triangle Borea Bookshelf and Floorstanding Speaker Size and Specs Comparison


    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


    Most Popular Speakers
    Klipsch Reference R-51M
    Klipsch R-51M
    2-way | 93 dB | 8 ohms
    Wharfedale Elysian 2
    Wharfedale Elysian 2
    3-way | 89 dB | 4 ohms
    ELAC Debut 2.0 B6.2
    ELAC Debut 2.0 B6.2
    2-way | 87 dB | 6 ohms
    Bowers & Wilkins 606 S2 Anniversary Edition
    B&W 606 S2
    2-way | 88 dB | 8 ohms
    KEF Q150
    KEF Q150
    2-way | 86 dB | 8 ohms
    Klipsch Reference Premiere RP-500M
    Klipsch RP-500M
    2-way | 93 dB | 8 ohms
    Wharfedale EVO4.1
    Wharfedale EVO4.1
    2-way | 87 dB | 8 ohms
    Bowers & Wilkins 606
    B&W 606
    2-way | 88 dB | 8 ohms
    Wharfedale SUPER LINTON
    Wharfedale SUPER LINTON
    3-way | 90 dB | 6 ohms
    Wharfedale LINTON Heritage
    Wharfedale LINTON
    3-way | 90 dB | 6 ohms

    Copyright © 2025 by SpeakerDecision
    About Privacy Contact US Camera Decision