M&K Sound X12+ Subwoofer
The X12+ delivers tactile, subterranean bass with the speed and composure to vanish into a serious system. Its dual 12-inch push-pull sealed design brings weight to cinema and music without muddying delicate passages, while Home Theater Review praised its seamless integration. Jiles McCoy found astonishing in-room extension below 10Hz, making this a formidable choice for deep, controlled impact.
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Deliciously Crispy
Bass
96/100
Integration
93/100
Dynamics
92/100
Build Quality
88/100
Features Usability
88/100
Value for Money
85/100
Pros
Exceptionally deep, tactile bass extension with authoritative output for movies and music.
Seamlessly integrates with main speakers, staying clean and unobtrusive during delicate material.
Dual-driver sealed design delivers high output with very low perceived distortion.
Balanced and RCA connections, pass-throughs, variable crossover, phase, and EQ support flexible system matching.
Cons
Deepest bass output shows some compression at extreme playback levels.
Large, heavy cabinet and black-only finish can be difficult to accommodate in multipurpose rooms.
Rear-mounted controls can be awkward to access after corner or wall placement.
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What Reviewers Are Saying
Assessments of Build Quality, Usability, and Overall Propositions.
Bass
96/100
Reviewers describe unusually deep, authoritative bass with excellent control: Home Theater Review heard clean authority on 20 Hz pipe-organ notes, while Jiles McCoy measured in-room extension below 10 Hz and called it outstanding. It adds substantial weight and tactile impact without becoming muddy or thick, and was said to play lower and louder than a pair of JL Audio F110 subwoofers in one comparison.
Integration
93/100
The X12+ was reported to blend seamlessly with M&K S300 monitors, to the point that the source of the bass was completely undetectable. Home Theater Review also found that it stayed out of the way during delicate material and avoided muddy or overly thick bass, supporting a natural, unobtrusive handoff to the main speakers.
Dynamics
92/100
Both reviews praise the X12+'s physical impact and willingness to play loudly. It delivered more weight, force and impact on "Radioactive," handled dynamic passages without apparent strain, and was described as becoming even more convincing as volume increased; measured discussion does note some compression at the deepest frequencies.
Build Quality
88/100
Home Theater Review describes a solid, internally braced sealed cabinet made from 22 mm MDF panels. The substantial push-pull enclosure and dual-driver layout present as purpose-built for demanding output, although the reviews say little about long-term durability or amplifier reliability.
Features Usability
88/100
The X12+ offers balanced and single-ended inputs and outputs, variable EQ, phase and crossover adjustment, plus a no-low-pass setting for use with an AVR or external processor. Reviewers also highlight its throughput connections for a THX system and its placement flexibility, though there is no app-based room correction or automated calibration discussed.
Value for Money
85/100
The available reviews do not directly assess the X12+'s asking price or compare its cost with competing subwoofers. They do, however, portray its deep extension, high output and seamless performance as fitting a top-tier product.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
YouTube Reviews
Forum Mentions
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Specifications
- 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
- 40-125 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 110W Average, 700W 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
Manufacturer's Description — M&K Sound
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
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
A Message from the Inventors of the Subwoofer
“Creating the next generation of M&K Sound subwoofers was not something we undertook lightly. With a long legacy of market-leading innovation to live up to, we are proud to present the M&K Sound X Series, built to bring new force, authority and clarity to the critical bottom octaves for the listening pleasure of serious music and movie lovers everywhere.”
Why Your system Needs an M&K Sound X+ Series Subwoofer
Above and beyond the obvious, simplistic answer: “more and better bass”, the combination of a well designed and conscientiously constructed subwoofer and main satellite speakers offers worthwhile performance advantages that improve overall system performance in many critical areas that are equally relevant for stereo and surround, for movie viewing and music listening
Here’s what happens when you physically separate reproduction of low frequency information from the upper and mid ranges. The most widely acknowledged beneft, of course, is improved deep bass extension, higher deep bass output levels and more control and authority, i.e., your system will play deeper, louder, cleaner, tighter bass.
With an M&K Sound X Series subwoofer, bass is exclusively reproduced by a speaker created and optimized for that purpose only. Removing the burden of deep bass from your main speakers provides major improvements in essential parameters such as midrange purity and accuracy. By liberating your main speakers from handling the tremendous demands of low bass, you also increase their effective power handling capabilities signifcantly, so that they can play louder without distortion.
Because your main amplifer no longer handles deep bass, the amount of power needed to achieve a given output level from your main speakers is greatly reduced (typically -50%). This ensures that your amp remains well within its safe operating limits with considerable overhead readily available as needed. Independent placement of subwoofer and satellites allows you to select an optimal position for each specifc frequency range. The spot that delivers best bass is almost never the one that also delivers best upper/mid performance. With no bass vibrations or internal bass pressure waves in your main speaker enclosures, resonances are eliminated for cleaner, clearer mid and high frequencies.
Since they no longer have to reproduce deep bass, your main speaker cabinets can be more compact with enhanced structural integrity for natural, uncolored sound and a narrow front that eliminates baffle diffraction distortion, resulting in more open, natural, three-dimensional sound.
No matter what some manufacturers may try to tell you, according to the immutable laws of physics: Big bass requires a big box.
Independent Evaluation
THX is a set of performance standards originally developed by Lucasfilm Ltd, the movie empire of Star Wars creator George Lucas, to lay out a set of criteria to ensure that the creations of cinematic artists are reproduced exactly as intended. The THX logo immediately became recognized as a seal of approval for quality-conscious cinema-goers around the world.
In 1991, M&K SOUND became one of the first manufacturers to join George Lucas and his Lucasfilm Home THX program for domestic installations.
Today, THX is the highest independent quality standard dedicated to the accurate reproduction of audio sources in the home. THX certification attests that the component has been thoroughly evaluated by a fully independent body and found to live up to the strictest quality requirements in the audio industry.
M&K SOUND X Series subwoofers meet and exceed THX specifications to deliver music and movies with natural, effortless realism and power.
Verified Dealers
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Authorized dealers for M&K Sound X12+ Subwoofer
- American Recorder — online and in-store — Simi Valley, California, United States (website)
- AUDIO 2000 — in-store — Wuppertal, Nordrhein-Westfalen, Germany (website)
- Audio Venue — online and in-store — London, England, United Kingdom (website)
- Audiolab Stereo & Video — online and in-store — Morrisville, Pennsylvania, United States (website)
- AudioPerformance — online and in-store — Stenkullen, Västra Götalands län, Sweden (website)
- AUTOMATED ENTERTAINMENT INC. — online and in-store — Vaughan, Ontario, Canada (website)
- Dubai Audio — online and in-store — Al Wasl, Dubai, United Arab Emirates (website)
- Elecson KLS — online and in-store — Paris, Île-de-France, France (website)
- Fidelity Acker & Buck — in-store — Rellingen, Schleswig-Holstein, Germany (website)
- Grahams Hi-Fi — in-store — London, England, United Kingdom (website)
and 12 more verified dealers