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Product Description

The MartinLogan Motion Foundation B1 is small in size but not sound, the most compact Motion Foundation model offers unheard of performance from such a versatile size.

The Gen2 Obsidian Folded Motion Tweeter S, Folded Motion Waveguide, and 5.5” aluminum midbass driver work together here to create a completely unexpected and engaging experience from a compact footprint. The MartinLogan Motion Foundation B1 is ideal for small spaces, especially when combined with a subwoofer, to create a highly musical, detailed experience wherever high quality sound is desired. Foundation B1 is also threaded to work with our STAND25 to create a stable stand mount solution.

The MartinLogan Foundation Story
MartinLogan Foundation Series products redefine affordability by incorporating many of MartinLogan’s renowned high-performance technologies at accessible prices.

Leveraging 40 years of design and engineering prowess and offering MartinLogan’s renowned thin-film performance, Motion® Foundation is a gateway into the world of true hi-fi sound. With a choice of 5 different models in 3 different finishes, Motion® Foundation speakers are an ideal foundation for building a high performance Stereo or Surround sound system. Bringing high end performance to a wider audience, Motion® Foundation offers incredible immersion for all your favorite content.

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 S

The Gen2 FMT S offers effortless performance, unmatched by conventional technologies. By folding thin film material, MartinLogan is able to pack more surface area into a small space. Large surface area, light weight and low excursion means an incredibly fast and responsive tweeter capable of reproducing the most nuanced content with stunning detail and clarity.

Specifications are subject to change without notice

Frequency Response

48 Hz – 23 kHz ± 3 dB

Tweeter Dispersion (horizontal x vertical)

90° x 90°

Recommended Amplifier Power

15 – 100 watts

Sensitivity

89 dB

Impedance

5 ohms

High Frequency Driver

0.94” x 1” (2.4 x 2.5cm) Gen2 Folded Motion® Tweeter S with 3.5 in2 (22.6 cm2) diaphragm.

Crossover Frequency

3,400 Hz (2-way)

Mid-Frequency Drivers

5.5” (14cm) aluminum cone with cast aluminum basket. Non-resonant sealed chamber format. Unibody cone construction.

Cabinet

Rear Ported

Binding Post Inputs

5-way Binding Posts (Non Bi-Wire)

Weight

11.5lbs / 5.2kg

Dimensions (H x W x D)

13-11/16” x 7-1/4” x 9-1/2”
34.6cm x 18.4cm x 24.05cm

Finish

Black, Walnut, and Satin White

Brand

MartinLogan

When it comes to electrostatic speaker design, there is no name bigger than MartinLogan. No company before it had managed to consistently leverage the purity and clarity of electrostatic speakers without sacrificing power and bass. The Kansas-based company's design and engineering teams have perfected the electrostatic model for high-quality audio during the past four decades.

Each component crafted by the company has the same goal: to reproduce the most complex musical recordings faithfully. The company's ESL series is still its most distinguished line. Among the standouts are the Ethos, Spire, and Summit X.

During the past two decades, they've expanded their product line to include home theater loudspeakers like The Stage, soundbars, and cutting-edge subwoofers. They've also introduced industry-leading technology, from handcrafted crossovers to Anthem Room Correction technology integration.

They have never strayed too far from their core focus: reference-grade electrostatic loudspeakers. This is showcased best in their flagship Neolith speaker. Standing over six feet high and made to order, it offers 23–22,000 Hz ±3dB frequency response and 90 dB/2.83 volts/meter sensitivity. For our clients that want this type of craftsmanship at an affordable price, we recommend the Classic ESL 9. It delivers classic audio performance ideal for entry-level audiophiles.

Overture is a proud dealer of MartinLogan products, selling customers the best speakers from MartinLogan. Interested in purchasing a new MartinLogan component? You can trade-in any component towards a MartinLogan product by filling out our Trade-In Form.