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The MartinLogan Motion 15 is a high-performance bookshelf speaker known for bringing the detailed, airy sound signature of MartinLogan's high-end electrostatic speakers into a compact, traditional form factor. Its standout feature is the Folded Motion tweeter, which uses a pleated diaphragm to "squeeze" air for lightning-fast response and minimal distortion. These were unboxed to photograph them, so they are Excellent/Near Mint, practically brand-new and have all the original boxes, packaging, manuals, cords.Frequency Response: 60–25,000 Hz Sensitivity: 92 dB/2.83 volts/meterImpedance: 5Ω (Compatible with 4, 6, or 8Ω amplifiers)High Frequency Driver: 1" x 1.4" Folded Motion Transducer with 5.25” x 1.75” diaphragmLow Frequency Transducer: 5.25” aluminum cone with cast basketRecommended Amplifier Power: 20—200 watts per channelCrossover Frequency: 2700 HzDimensions: (H x W x D) 11.4" x 6.8" x 9.5" Weight: 12 lbs eachKey Features:Folded Motion Tweeter: Delivers fast, low-distortion, and precise high-frequency soundAluminum Woofer: Features a rigid, non-resonant cone with a cast basket to reduce distortionDesign: Bass-reflex (rear-ported) enclosure with 5-way binding postsGrille: Magnetic, perforated steel grilleCosmetic Condition: Overall we rated this at Excellent/Near MintIn the Milwaukee Area? Stop in our shop to inspect/demoSee our feedback and thank you for considering. All the gear we sell is packaged with great care for safe arrival in the condition advertised.
At USD$400 per speaker, this listing is priced ambitiously, sitting well above the typical used market range of USD$250–USD$300 per unit for pairs in great condition and far exceeding the USD$500–USD$600 typical pair price. You are effectively paying near the original discontinued retail price of USD$799.95 per pair (or roughly USD$400 each) for an older model launched in 2012.
The Motion 15 remains a worthwhile buy for its distinctive Folded Motion® tweeter and surprisingly flat on-axis frequency response, which made it one of the best-measuring mini-speakers in its class. It delivers clear, detailed highs and high sensitivity (87.1 dB) that pairs well with many amplifiers, making it a strong candidate for desktop or small-room setups where its compact size shines. If this listing is actually for a single speaker, the price is steep; if it mistakenly lists a pair at USD$400 total, it would be an exceptional bargain worth immediate pursuit.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
MartinLogan emerged in the late 1970s from Lawrence, Kansas, when Gayle Martin Sanders and Ron Logan Sutherland, sharing a passion for electrostatic loudspeakers, united their engineering and design expertise. The duo, whose middle names inspired the brand, unveiled their breakthrough at the 1983 CES with the Monolith—the world's first practical hybrid electrostatic speaker, blending a curved panel for mids and highs with a dynamic woofer for bass. This American innovation addressed longstanding electrostatic limitations like fragility and poor low-end response, propelling the company from a high-end audio store collaboration to a dedicated manufacturing powerhouse.
The brand specializes in electrostatic and hybrid speakers, from flagship floorstanders like the CLX and Summit X to more accessible Motion Series designs, alongside complementary powered subwoofers and select electronics. Their proprietary thin-film transducers, advanced panel assembly, and room-optimized engineering define a lineup that prioritizes transparency and precision over conventional dynamic drivers, eschewing amplifiers, turntables, DACs, headphones, or cables.
Positioned firmly in the high-end market, MartinLogan commands respect among discerning audiophiles for its unwavering commitment to electrostatic purity, delivering ethereal soundstaging and timbral accuracy that make cabinets vanish. Now part of the PML group alongside Paradigm and Anthem, it blends Kansas heritage with rigorous innovation, appealing to buyers seeking reference-level realism in home audio and theater systems.
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