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X12+ Subwoofer



The most advanced subwoofers technologies for the future

New Carbon Fibre Woofer Cones have been developed for all models with ultra-high strength and rigidity to accommodate the added power and excursion of the new X+ Series. M&K Sound’s proprietary CNC-machined, extruded aluminium Distortion Killer Shorting Rings also guarantee absolute control and distortion-free, exemplary performance in all settings.

M&K Sound’s iconic Push-Pull subwoofer architecture and “reversed double driver” non-isobaric configuration mean that both drivers in the cabinet are ‘exposed’ to room air. Consequently, and like the X-Series before, the X+ Series models are effectively two subwoofers in one cabinet enabling a further associated reduction in distortion. This is made possible by having one inverted driver in relation to the other cancelling non-linearities to produce totally symmetric waveforms.

The X15+, X12+ and X10+ all feature full 25mm MDF construction and bracing for negligible panel vibrations or cabinet resonances, and increased venting at the base of the woofers mitigates distortion due to air turbulence. These milled cavities also act as convenient carrying handles for installation efficiency

M&K’s function and form co-exsist in harmony

Cosmetic makeovers for the X+ Series arrive in the form of recessed front baffles and convenient invisible magnetic grille attachment mechanisms. Harmonizing with the bold but Scandi-cool looks of the M&K S150 and S300 speakers, the new subwoofers offer cleaner lines and more discreet curved edges to complement living spaces or dedicated home cinema rooms.


M&K audio engineers are among the world’s best, and passing THX rigorous standards for audio certification, means passing hundreds of test. M&K can be proud of this accomplishment, and audio enthusiast everywhere will be pleased with the extraordinary pure, powerfull output of these superb subwoofers.

Steven MartzVice president of global technology, THX Ltd - 2021

Miller & Kreisel X12+ Subwoofer

Excluding Sales Tax
  • Specifications X12+

    Specifications for the X12+ Subwoofer


    Frequency Response: 18-200 Hz (Average Response in Room +/- 3 dB)
    Frequency Roll Off – THX EQ: 18 Hz (-6 dB 20 Hz Nearfield )
    Frequency Roll Off – Anechoic EQ: 18 Hz (-6 dB 20 Hz Nearfield)
    Variable Low Pass Filter: 40-200 Hz Continuesly Variable / 4th Order
    Loss Pass Filter Bypass: 40-200 Hz No Low Pass
    Fixed 80 Hz Filter Yes (Equivalent to THX 80Hz Ref Low Pass)
    Phase Control: 0 – 180 deg Continuesly Variable
    Line level input/output: 2 x RCA phono Left / Right – input / output
    Line level input/output: 2 x XLR Left / Right – Input / output
    Amplifier type:   Analog input / switch mode power output
    Drive unit: 2 x 12” Extra Long Throw
    System Principle: Push Pull Sealed enclosure
    Amplifier Power output RMS: 600 watt 0.5% THD at 300W into 4 ohms
    Amplifier Power output Peak: 1200 watt  
    Standby Power Consumption: 0.5 watt 120W Average, 800W Max
    Headroom Limiter Maximizer: Yes (Dynamic driver excursion control)
    Auto Power detect on/off: Yes  


    Finish: Satin Black


    Dimensions H x W x D 28.7 x 17.7 x 15.2 in / 72.8 x 45.0 x 38.5 cm
    Weight: Netto 101.2 lbs / 45.9 kg
    Manual No  
    Manual Yes Gloves, US/EU Power cords, Rubber Feet
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