If we were to select one brand that really pivoted at the right time to offer one of the most comprehensive ranges of wireless loudspeakers and subwoofers — the most obvious answer would be KEF. The British manufacturer of high-end passive speakers, wireless speakers, architectural speakers, and subwoofers, has really been ahead of the curve when it comes to forward thinking solutions; especially for those of us who do not have a lot of space at home.
This brings us to KEF’s latest product offerings, the KC92 and 4 Kube MIE Subwoofers. Let’s find out what they have to offer.
Shared Features
The KC92 and Kube MIE Series feature KEF’s proprietary Digital Signal Processing (DSP) algorithm, the Music Integrity Engine® (MIE). Tailored for each model, MIE ensures every component works within the individual subwoofer in perfect synergy. The MIE supports the overall performance of each subwoofer providing detail and sound accuracy.
To complement MIE, the subwoofers also include IBX (Intelligent Bass Extension); a process that analyzes the input signal, and allows the subwoofer to play louder and deliver wide dynamic range at any listening level.
KC92
The KC92 builds on the foundation of the KEF’s popular KC62 compact subwoofer (released in 2021) with a similar design and driver assembly but in a larger cabinet.
For optimized bass performance, the KC92 subwoofer incorporates a dual driver arrangement mounted in a force-canceling (Uni-Core) assembly. The drivers output sound from the sides of the cabinet, rather than from the font. This configuration allows the KC92 to deliver greater extension and impact and from a design that is smaller than similar models in its price range and size.
In addition to force-cancelling drivers, the KC92 also incorporates KEF’s P-Flex Surround structure. The P-Flex surround material (aka Origami surround due to its unique pleated formation) adds to the support of deeper bass extension, more detailed bass reproduction, and reduced distortion.
To further support powerful bass output, the KC92 includes 1,000 watts of Class D amplification (a dedicated 500W amplifier for each driver).
The KC92 can output lot of power with precise control, improving timing accuracy and dynamic response for a more detailed sound and the ability to deliver sudden bursts of power when needed.
The KC92 provides both line-level and speaker-level inputs, it can easily connect to any amplifier. Utilizing KEF SmartConnect, it automatically optimizes gain based on whether a mono or stereo input is in use, ensuring optimal performance. The line output with a High Pass Filter (HPF) makes it easier for users to fine tune the output depending on the other speakers being used in the system.
With five room placement options (free space, next to a wall, in a corner, in a cabinet, or in a small apartment) the KC92 easily integrates into any room.
The relatively compact size and minimalist design of the KC92 is easy to match with a variety of speakers (preferably other KEF speakers, but can complement other brands as well). The KC92 is available in White Gloss and Black Gloss finishes for $1,999.99.
Kube MIE Series
If the KC92 is a little out of your price range, one of KEF’s Kube MIE Series subwoofers might be just the right solution for you.
The Kube MIE subwoofers are offered with four driver sizes (15″,12″,10″, and 8″) so there is definitely a model that will work for your needs.
Multiple connectivity options and room EQ settings make installation and setup easy.
Each Kube MIE Series model has a long throw driver that fires from the front, increasing output at lower frequencies. This method produces an impression of direct force within the space, resulting in a tactile, and potent bass experience. Kube creates an immersive, powerful soundscape by accurately reproducing music and movies with wide dynamics and from high to low frequencies.
The included Class D amplifiers ensure efficient and cool operation, providing ample power for clear bass response.
The Kube MIE Subwoofer sealed cabinet design facilitates simpler positioning. Kube subwoofers complement room interiors. With four sizes available, Kube can be customized to fit any space and need, including gaming, home cinema, and music.
Kube has a placement-dependent EQ that is adjustable to maximize in-room performance thanks to the Music Integrity Engine
With line level and speaker level inputs, the Kube MIE subs can be connected to any amplifier. KEF SmartConnect optimizes the gain for best performance by sensing whether a mono or stereo input is being utilized automatically.
Tip: The KC92 and Kube MIE Subwoofers are compatible with KEF’s KW1 Wireless Subwoofer Kit ($194 at Amazon) which makes them even more convenient to use by getting rid of those long subwoofer cables.
Comparison Chart
| Kube 8 MIE | Kube 10 MIE | Kub2 12 MIE | Kube15 MIE | KC92 | |
| Price | $599.99 | $799.99 | $999.99 | $1399.99 | $1,999.99 |
| Design | Sealed | Sealed | Sealed | Sealed | Force-Cancelling (Uni–Core) |
| Drivers | 1 x 200mm (8 inches) | 1 x 250mm (10-inches) | 1 x300mm (12-inches) | 1 x 380mm (12-inches) | 2 x 228.3 mm (2 x 9-inches) |
| Frequency Response (+/- 3dB) | 34Hz to 140Hz | 24Hz to 140Hz | 22Hz to 140Hz | 20Hz to 140Hz | 11Hz to 200Hz |
| Max Output (SPL) | 105 dB | 111 dB | 114dB | 116 dB | 110 dB |
| Amplifier Type | Class D | Class D | Class D | Class D | Class D |
| Amplifier Power Output (RMS) | 300 watts | 300 watts | 300 watts | 300 watts | 1000 Watts total (2 x 500 watts) |
| Variable Low Pass Filter | 40Hz to 140Hz, LFE | 40Hz to 140Hz, LFE | 40Hz to 140Hz, LFE | 40Hz to 140Hz, LFE | 40Hz to 140Hz, LFE |
| Inputs | RCA, Speaker Level, KW1 expansion port | RCA, Speaker Level, KW1 expansion port | RCA, Speaker Level, KW1 expansion port | RCA, Speaker Level, KW1 expansion port | RCA, Speaker Level, KW1 expansion port |
| Power Requirements | 100 – 240v./50 to 60hz | 100 – 240v./50 to 60hz | 100 – 240v./50 to 60hz | 100 – 240v./50 to 60hz | 100 – 240v./50 to 60hz |
| Power Consumption | 300VA | 300VA | 300VA | 300VA | 1000 watts operating .5 watts standby |
| Dimensions (HWD -includes Rear Panels and Feet) | 293 x 293 x 310mm 11.5 x 11.5 x 12.2 inches | 370 x 353 x 370 mm 14.4 x 13.9 x 14.6 inches | 410 x 393 x 410 mm 16.3 x 15.5 x 16.1 inches | 519 x 500 x 515mm 23.4 x 19.7 x 20.3 inches | 352.5 x 330 x 360.5mm 13.89 x 13 x 14.2 inches |
| Weight | 9.4 kg 20.5 lbs | 15.4 kg 34 lbs | 18.6 kg 41 lbs | 27.5 kg 60.6 lbs | 20 kg 44 lbs |
| Optional KW1 Wireless Kit | Yes | Yes | Yes | Yes | Yes |
Availability and Pricing
From February 20th, the KEF KC92 Force-cancelling Subwoofer and Kube MIE Subwoofers are available for myKEFmembers to purchase ahead of their official launch on Tuesday, February 27th, 2024.
- Kube 8 MIE: $599.99
- Kube 10 MIE: $799.99
- Kube 12 MIE: $999.99
- Kube 15 MIE: $1399.99
- KC92: $1999.99
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