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KEF Kube 15 MIE
15-inch front-firing active subwoofer
Kube 15 MIE, the largest model in the Kube range, is engineered to provide the deepest bass for music and movies, giving you a ground-shaking immersion. Perfectly suited for large rooms, the 15-inch driver and 300W (RMS) Class D amplifier combine to deliver the most visceral bass performance. With Music Integrity Engine, the Kube 15 MIE is optimised to deliver exceptional depth and dynamics.
Seamless elegance
The sealed cabinet design facilitates optimal placement, while the contemporary design seamlessly blends with the room's decor.
Music Integrity Engine® (MIE)
KEF‘s proprietary DSP (Digital Signal Processing) algorithms ensure that every component of the subwoofer works in perfect harmony. Features such as iBX Intelligent Bass Extension provides even deeper and precise bass at any listening level.
Feel the force
The Kube features a front-firing long throw driver with a large cone area and high excursion, delivering higher output at lower frequencies. Its efficient and cool-running 300W Class D RMS amplifier further enhances performance.
Versatile immersion
The largest model in the Kube range with the highest output, perfect for movies, music, TV and gaming in larger rooms and dedicated home theatres.
Effortless wireless integration
The KW1 enables optimal placement of the Kube without being limited by cables. High-quality wireless transmission ensures the delivery of every nuance and impact from your favourite movies and music.
Well connected
Kube offers versatile connection options, including KEF SmartConnect and speaker level inputs, making connecting into any system a breeze.
3 room position EQ options
The intuitive preset options ensure excellent performance from Kube no matter where in the room it is placed.
Multiple power modes
'Auto wake up' detects audio signals for instant readiness, 'Always on' mode keeps it ready to play instantly, and '12V trigger' provides automatic wake-up.
What is in the box
- Kube 15 MIE subwoofer
- Power cord
- Euroblock speaker level connector
- User manual and warranty information
Dealers selling KEF near you
Built around a 15in sealed driver and 300W Class-D amp, the Kube 15 MIE delivers deep extension and surprisingly tight control, with spec'd 20Hz response and 116dB headroom that suits both music and film. Review coverage from ecoustics applauds KEF's bass definition and decor-friendly design, making it a compelling high-performance subwoofer.
Pros
- Deep, authoritative low-frequency performance with substantial headroom, giving room-filling bass that supports both music and movie soundtracks.
- Sealed 15in driver combined with 300W Class-D amplification yields tight, controlled transient response and precise bass definition.
- Robust, decor-friendly cabinet and compact footprint (corner-friendly cube concept) that integrates neatly with home-theatre systems.
Sound Quality
89/100
Bass
90/100
Large 15" sealed driver, claimed 20Hz ±3dB and 116dB max output suggest strong extension and authority for a sealed design. No reviewer measurements supplied; score based on driver size, spec'd response and power (300W RMS). Bass >92 not assigned because there are no direct comparisons to larger reference models.
Dynamics
86/100
Sealed cabinet and a single large driver with 300W Class-D amplification typically favor tight, controlled transient response — supporting good macro/micro dynamics. No listening-room or reviewer headroom/compression reports were available; score reflects expected behavior from sealed large-driver design and power rating.
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Integration
80/100
Inputs (RCA, speaker-level, LFE) and variable low-pass (40–140Hz) give flexible tuning options, which should aid blending with mains. However, no outcome-based reviewer evidence of 'seamless' or 'disappearing' integration is provided. Features ≠ Integration; add outcome evidence or lower Integration.
Build Quality
88/100
Heavy (27.5 kg) and compact sealed enclosure dimensions indicate a robust cabinet and driver assembly consistent with KEF's build standards. No reviews mentioning durability or finish flaws were provided; rating based on brand reputation and specs.
Features Connectivity
80/100
Includes RCA/LFE, speaker-level inputs and KW1 expansion port plus variable low-pass (40–140Hz) — straightforward, useful connectivity for most setups. No app, room correction or wireless control listed, so functionality is solid but not cutting-edge.
Value for Money
82/100
At roughly $1,499 for a 15" sealed KEF sub with 20Hz extension and 116dB output, this is a premium offering with sensible pricing relative to features and driver size. Lacking review statements like 'best in class' or explicit value endorsements, the score is conservative but favorable.
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