MartinLogan Motion XT B100 Bookshelf Speaker


NEW PRODUCT: The MartinLogan Motion XT collection is the most ambitious acoustic and aesthetic development in their 40-year history. Defined by elegance and performance, leveraging exclusive technologies and decades of experience. The Motion XT B100 bookshelf speaker is a whole new level of quality and excellence.


With a bold new look and a suite of new audio upgrades, the Motion® series is ready to impress. Completely redesigned from the inside out, this is our best sounding Motion® series ever. What does “best” mean? We mean that through a rigorous development process involving anechoic chamber measurements, blind listening tests, and in room measurements we crafted a more refined sound for Motion® than ever before that is distinctly MartinLogan.

The Motion XT B100 is MartinLogan’s newest and best bookshelf speaker for those wanting maximum performance without moving to a tower speaker. The Gen2 Folded Motion® XT Tweeter and Nomex®-Reinforced Kevlar® woofer deliver exceptional clarity and precision, making B100 ideal for 2-channel or home theatre setups. For those desiring a stand mount option, the B100 is threaded to securely attach to our matching STAND25 speaker stand (sold separately) for maximum stability.


Dimensions (H x W x D, with feet) 14-1/2” x 8” x 12-1/2”
36.8cm x 20.3cm x 31.8cm
Frequency Response 45 Hz – 25 kHz
± 3 dB
Tweeter Dispersion (horizontal x vertical) 90° x 45°
Recommended Amplifier Power 20 – 250 watts
Sensitivity 93 dB
Impedance 4 ohms
High Frequency Driver 1.25” x 2.4” (3.2 x 6.1cm) Gen2 Obsidian Folded Motion XT Tweeter with 12.4 in2 (79.8 cm2) diaphragm
Crossover Frequency 2,600 Hz (2-way)
Mid-Frequency Drivers 6.5” (16.5cm) Nomex Reinforced Kevlar® cone with cast aluminum basket. Non-resonant asymmetrical chamber format. Unibody cone construction.
Cabinet Rear Ported
Binding Post Inputs Custom bi-amp/bi-wire capable 5-way binding posts
Weight 20.5lbs / 9.3kg
Finish Gloss Black, Walnut, and Satin White

Specifications are subject to change without notice.

Motion Reimagined. Our most ambitious acoustic and aesthetic development in MartinLogan’s 40-year history. Motion® Series defines elegance and performance by leveraging exclusive technologies and decades of experience. The result is a loudspeaker collection that is not just an upgrade of its predecessor, but a whole new level of quality and excellence.

Legendary MartinLogan Sound. MartinLogan speakers are known for their exceptional articulation, detail and realism, regardless of the listening environment. By using advanced thin-film technologies and Controlled Dispersion, MartinLogan delivers a unique and unparalleled listening experience that is not commonly found in other speakers.

Gen2 Obsidian Folded Motion® Tweeter XT. The Gen2 Obsidian FMT XT Tweeter has been upgraded with a larger motor to provide higher output and lower distortion. The FMT XT offers the most effortless and detailed sound in the Motion range with a 40% increase in surface area over our signature FMT. Outside of our legendary Electrostatic speakers, these new tweeters provide our cleanest, most detailed and accurate high frequency presentation to date.

Folded Motion® Waveguide. After an extensive evaluation of nearly 50 design options, the Folded Motion® Waveguide profile was meticulously chosen to harmoniously align with the dispersion of the midrange drivers, resulting in enhanced output. The waveguide guarantees consistent sound quality regardless of the listener’s position and minimizes unwanted room reflections. Proper waveguide design is crucial as it helps control the sound’s dispersion pattern, ensuring that the sound is evenly distributed across the listening area and resulting in optimal sound quality.

Nomex®-Reinforced Kevlar® Midrange. The Nomex®-Reinforced Kevlar® Mid-bass in the Motion® XT B100 offers a perfect balance of lightweight, strength, anti-resonance and anti-ringing properties for unparalleled sound quality. When combined with the Gen2 Obsidian FMT XT, the clarity of vocals, dialogue and instrumental accuracy is unmatched at any volume. The seamless integration with Motion® XT CI products makes creating custom solutions effortless.

Modern Design. Luxurious FinishesThe Motion® speakers are the epitome of high-performance audio, utilizing cutting-edge technology and the highest quality materials to deliver sound quality that is truly unmatched. Their sleek, sophisticated design is an artful complement to any luxurious interior. Available in three finishes of Piano Black, Walnut, and Satin White, the Motion® series is an exquisite addition to any discerning individual’s home, rivaling the most elegant of furnishings. Upgrade your audio experience and enhance your space with the Motion® series.

F.A.S.T. Outrigger Feet. The tower models in the Motion® range are designed with tool-less height adjustability in mind, using the included rubber feet or spikes, which enables the user to effortlessly level the speaker for optimal stability on any floor. Additionally, the built-in anti-vibration properties reduce the transfer of energy from the speaker to the floor, resulting in lower distortion and coloration, providing a more accurate and detailed sound. These proprietary outrigger feet allow you to effortlessly adjust your speaker’s height with just a turn of the knurled caps. Whether you want to raise or lower the spike or pad, it’s as easy as turning the caps. Experience ultimate convenience and precision with MartinLogan’s F.A.S.T. Outrigger Feet.



Additional information


Gloss BLK, Satin WHT, Walnut