The Martin Logan Motion Foundation B1 Bookshelf Speaker in Walnut (Each) delivers audiophile-grade high-frequency transparency and energetic dynamic agility in an elegantly compact cabinet. Designed to make MartinLogan’s legendary thin-film transducer performance accessible in versatile listening spaces, this 2-way standmount speaker combines an all-new Gen2 Obsidian Folded Motion Tweeter S with an engineered Folded Motion Waveguide and a custom 5.5-inch aluminum cone midbass driver. Clad in an attractive Walnut finish and governed by a proprietary McCracken-Vojtko crossover network, it produces pristine vocal separation, wide horizontal dispersion, and tight bass extension for dedicated stereo setups or compact home theater surround channels.
Key Features & Innovations
Gen2 Obsidian Folded Motion® Tweeter S (FMT S) — the Martin Logan Motion Foundation B1 Bookshelf Speaker in Walnut (Each) incorporates a thin-film accordion-pleated diaphragm that squeezes air rather than pushing it, generating crystalline treble past 23 kHz with ultra-low distortion and fast transient attack.
Folded Motion® Waveguide Directivity Integration — acoustically couples the FMT S tweeter to the room, ensuring consistent, uniform high-frequency dispersion across a broad listening window while curtailing early boundary reflections from walls and ceilings.
5.5-Inch High-Output Aluminum Midbass Driver — stiff, lightweight aluminum cone construction ensures high power handling and pistonic low-frequency excursion, delivering tight, punchy bass impact down to 48 Hz with zero cone breakup.
Proprietary McCracken-Vojtko Crossover Topology — precision-voiced through extensive anechoic measurement and double-blind listening tests, preserving phase coherence and seamless handoff between the driver elements.
Rear-Firing Tuned Reflex Port & Anti-Resonant Cabinet — robust MDF construction with internal bracing eliminates box coloration, while the low-turbulence rear-firing port maximizes air velocity for authoritative bass response.
FAQ — Motion Foundation B1
Is the Martin Logan Motion Foundation B1 Bookshelf Speaker in Walnut (Each) sold as an individual unit or a pair?
The Martin Logan Motion Foundation B1 Bookshelf Speaker in Walnut (Each) is priced and packaged individually (as a single unit), offering total flexibility when ordering an exact stereo pair or configuring odd-numbered surround channels.
What amplifier power is recommended for the Foundation B1?
MartinLogan recommends pairing the speaker with clean stereo receivers, integrated amplifiers, or AV receivers rated between 40 and 100 Watts continuous output per channel into 4 or 8 Ohms.
Can this speaker be mounted on stands or placed on a bookshelf?
Yes, its compact form factor fits conveniently on bookshelves, credenzas, or dedicated mass-loaded speaker stands, with included adhesive rubber feet to provide vibration isolation and surface protection.
What kind of speaker cable terminations does it accept?
The rear terminal cup features premium 5-way binding posts capable of accepting standard banana plugs, spade connectors, pin connectors, or bare speaker wire.
Why Buy From Us
Authorized MartinLogan dealer offering 100% genuine factory-authentic products with full manufacturer warranty protection
Experienced hi-fi specialists available to guide amplifier pairing, room acoustics, and surround system layout
Dedicated post-purchase customer support for speaker positioning and crossover tuning
Fast, secure priority shipping with reinforced protective packaging on every order
Related & System Matches
MartinLogan Motion Foundation C1 center channel speaker
MartinLogan Motion Foundation F1 and F2 floorstanding tower loudspeakers
