MartinLogan Motion SLM X3 Ultra-Slim Passive Soundbar - Dreamedia AV
MartinLogan Motion SLM X3 Ultra-Slim Passive Soundbar - Dreamedia AV
MartinLogan Motion SLM X3 Ultra-Slim Passive Soundbar - Dreamedia AV
MartinLogan Motion SLM X3 Ultra-Slim Passive Soundbar - Dreamedia AV
MartinLogan Motion SLM X3 Ultra-Slim Passive Soundbar - Dreamedia AV
Vendor: MartinLogan

MartinLogan Motion SLM X3 Ultra-Slim Passive Soundbar

Ultra-Slim 3 Channel Soundbar with Folded Motion Tweeters

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MartinLogan Motion SLM X3 Ultra-Slim Passive Soundbar

Unveil the Elegance of Sound with MartinLogan Motion SLM X3

Imagine a sound system that not only fills your space with exquisite sound but also blends seamlessly with the aesthetics of your home. The MartinLogan Motion SLM X3 Ultra-Slim Passive Soundbar is engineered for the audio connoisseur who refuses to compromise on sound quality or visual harmony.

Premium Audio Quality in a Sleek Package

The Motion SLM X3 is not just a soundbar; it's a statement of elegance and quality. With its ultra-slim design, this passive soundbar offers an auditory experience that rivals many high-end speaker systems, while its understated profile maintains the integrity of your living space's design.

Distinctive Sound Clarity

The hallmark of the MartinLogan brand is its dedication to sound clarity. At the core of this soundbar are three 1" x 1.4" Folded Motion Transducers, which deliver precise and highly dynamic audio. This proprietary technology ensures that every detail of your music and movies is reproduced with lifelike accuracy.

Impressive Bass Response

Despite its slim form, the Motion SLM X3 houses six 4" paper-cone woofers that work in harmony to produce a rich and full-bodied bass. When paired with a subwoofer, the soundbar's bass capabilities are further enhanced, providing a cinematic experience that resonates throughout your entire room.

Engineered for Perfection

The soundbar's crossover components are meticulously selected to ensure audiophile-quality sound reproduction. Custom air core coil inductors and polyester film capacitors in series, along with low DF electrolytic capacitors in parallel, work together to manage the frequency distribution between the tweeters and woofers, resulting in a balanced and immersive soundstage.

Uncomplicated Connectivity

Connectivity should never be a complication. The MartinLogan Motion SLM X3 features push-style binding post inputs, making the setup process straightforward and user-friendly. This ensures that you can integrate the soundbar into your existing home theater system with ease.

Versatile Placement Options

The Motion SLM X3 is designed with flexibility in mind. Whether you prefer to wall-mount your soundbar with the included bracket or place it on a shelf with the provided feet, this soundbar accommodates your unique setup. It can even be oriented horizontally or vertically, allowing for additional placement options without compromising sound quality.

Design That Complements Your Space

The soundbar's high-impact plastic cabinet, adorned with an anodized, brushed aluminum baffle, exudes a sense of sophistication. The magnetically attached cloth grille can be removed to reveal the soundbar's sleek lines and high-quality finish, allowing it to fit into any decor, whether modern or traditional.

Main Features at a Glance:

  • High-Frequency Transducers: Three 1" x 1.4" Folded Motion Transducers for unparalleled clarity
  • Low-Frequency Drivers: Six 4" paper cone woofers for deep, resonant bass
  • Crossover Components: Custom designed for exceptional audio fidelity
  • Ultra-Slim Design: Perfect for tight spaces and minimalist setups
  • Mounting Options: Versatile and easy to install, whether on the wall or a surface
  • Compatibility: Works with 4, 6, or 8 Ohm rated amplifiers

The MartinLogan Advantage

MartinLogan is synonymous with innovation in the audio industry, and the Motion SLM X3 is no exception. With a frequency response of 120Hz - 25kHz ±3dB and a sensitivity of 94 dB/2.83 volts/meter, this soundbar is capable of delivering high-quality sound that is both powerful and nuanced.

Long-Term Assurance

Confidence in your investment is paramount. That's why the Motion SLM X3 comes with a comprehensive 5-year warranty, ensuring that your soundbar will continue to provide exceptional performance for years to come.

Installation Made Simple

Dreamedia is here to assist you in designing the perfect home theater system. With the MartinLogan Motion SLM X3, installation is a breeze, but should you need any assistance, our team is ready to provide expert advice and support.

Your Sound, Your Way

Whether you are a movie buff seeking the ultimate home cinema experience or an audiophile longing for crisp, concert-quality music, the Motion SLM X3 adapts to your needs. Experience sound that is as expansive as a full-sized speaker system, with the added benefit of a sleek, space-saving design.

Embrace the MartinLogan Motion SLM X3

Transform your living space into an oasis of pure sound with the MartinLogan Motion SLM X3 Ultra-Slim 3 Channel Passive Soundbar. Dreamedia is here to help you realize your home theater dreams, with products that don't just meet expectations—they redefine them.

Our Review

MartinLogan Motion SLM X3 Ultra-Slim 3 Channel Passive Soundbar Review


MartinLogan has long been synonymous with high-fidelity audio, consistently delivering products that strike a fine balance between performance and aesthetics. The MartinLogan Motion SLM X3, released in October 2017, aims to uphold this reputation within the realm of home theater. As a passive soundbar designed for a sleek home theater setup, it promises an enriching audio experience without the clutter of traditional surround systems.

Design and Build


The Motion SLM X3's ultra-slim form factor is immediately striking. Measuring just 2 inches in depth, it is crafted to blend seamlessly with modern flat-screen TVs. The high-impact plastic cabinet, complemented by an anodized, brushed aluminum baffle, exudes a minimalist yet premium feel. The magnetic cloth grille adds a touch of elegance, allowing for a clean facade when the drivers should be hidden.

Installation and Mounting

MartinLogan has ensured that the installation of the Motion SLM X3 is as graceful as its design. Whether wall-mounted beneath a TV or placed on a stand, the soundbar includes the necessary fixtures for a secure setup. The low-profile design does not encroach on living space, making it particularly suitable for urban dwellings where every inch counts.


Audio Technology

The Motion SLM X3 is not just a triumph of design but also a beacon of MartinLogan's acoustic innovation. The soundbar houses six drivers—two 4-inch paper-cone woofers and a Folded Motion tweeter per channel—delivering a full spectrum of sound across three discrete channels. This setup ensures clarity and a sense of direction that is often lacking in single-unit soundbars.


With its passive design, the Motion SLM X3 requires an external amplifier, which allows for a degree of customization in setup. Its compatibility with 4, 6, or 8 ohm rated amplifiers means it can integrate into a variety of existing home theater systems. However, this also implies that users will need to invest in an amplifier if they do not already own one, potentially adding to the overall cost.


Sound Quality

The true merit of any sound system lies in its audio performance. The Motion SLM X3 shines in its delivery of crisp, clear dialogue and a balanced midrange. The proprietary Folded Motion tweeters are particularly adept at reproducing high frequencies with precision, ensuring that every nuance in music and film soundtracks is captured with exceptional detail.

Bass Response

While the Motion SLM X3 handles mids and highs with aplomb, its slim profile does impose limitations on bass frequencies. Without a built-in subwoofer, the soundbar relies on pairing with an external subwoofer to achieve a full-bodied bass response. When appropriately matched, the result is a cohesive and immersive listening experience, though it requires additional investment and space for the subwoofer.

Soundstage and Acoustic Space

The compact nature of the Motion SLM X3 means that it cannot fully replicate the expansive soundstage offered by separate speakers. While it does an admirable job within its constraints, audiophiles may notice a narrower acoustic space, particularly when it comes to the precise imaging and transparency cherished in high-end music listening.

User Experience

Daily Use

In a typical home theater configuration, the Motion SLM X3 is a delight. Its unobtrusive design and superior sound quality make it an excellent choice for daily use, whether it's for catching up on TV shows or indulging in cinematic blockbusters. The passive nature of the soundbar means that user interaction is largely dependent on the connected amplifier, which should be taken into consideration when evaluating control simplicity.

Value Proposition

The MartinLogan Motion SLM X3 sits at a higher price point compared to many active soundbars. However, for those who prioritize audio quality and design elegance, the investment can be justified. It competes favorably with other high-end passive soundbars and offers a clear step up from budget-friendly options.

Final Thoughts

The MartinLogan Motion SLM X3 is a testament to the brand's commitment to high-quality audio and sleek design. While it may not offer the expansive soundstage of separate speakers, its superb clarity, discreet profile, and exceptional build quality make it a compelling choice for those with limited space. It's especially fitting for the discerning listener who is willing to invest in complementary components to achieve an integrated home theater experience. The Motion SLM X3 is ideal for urban homes and minimalist spaces where performance and aesthetics are valued equally.


General Specifications

  • Product Name: MartinLogan Motion SLM X3 Ultra-Slim 3 Channel Passive Soundbar
  • Speaker Type: Passive, 3-channel soundbar
  • Frequency Response: 120Hz - 25kHz ±3dB
  • Recommended Amplifier Power: 20 - 140 watts per channel
  • Impedance: 5 Ohms
  • Sensitivity: 94 dB/2.83 volts/meter
  • Crossover Frequency: 2.7 kHz
  • High-Frequency Transducer: 1" × 1.4" Folded Motion Transducer with 5.25" × 1.75" diaphragm
  • Mid-Frequency Transducer: Dual 4" fiber cone woofers with passive bass radiators
  • Weight: 13 lbs
  • Dimensions (HxWxD): 6.3" x 48" x 2"
  • Warranty: 5 years

Design & Mounting

  • Enclosure Type: Sealed
  • Cabinet Material: Non-resonant
  • Mounting Options: Wall-mountable with included bracket, shelf or equipment cabinet placement with included feet
  • Orientation: Horizontal or vertical


  • Number Of Channels: 3
  • High-Frequency Driver: Three 1" x 1.4" Folded Motion Transducers
  • Low-Frequency Drivers: Six 4" paper cone
  • Crossover Components: Custom air core coil inductors, polyester film capacitors in series, low DF electrolytic capacitors in parallel


  • Binding Post Inputs: Push style

Additional Features

  • Ultra-Slim Design: Yes
  • Folded Motion Tweeters: Yes
  • Mid-range/Bass Drivers: Yes
  • Wall Mount Frame: Yes
  • Audiophile Quality Crossover: Yes
  • Compatibility: Compatible with 4, 6, or 8 Ohm rated amplifiers

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