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PREOWNED – FULLY TESTED – PRICE PER PAIR – SPEAKERS IN GREAT WORKING CONDITION – MINOR DENT IN FRONT MESH OF 1 SPEAKER
Martin Logan is proud to introduce the slim, on-wall EFX™ hybrid electrostatic loudspeaker, featuring XStat™ technology, dramatically reducing cabinet size, yet establishing new standards for efficiency, dynamics and precision.
CLS™ XStat™ Transducer
Housed within a radical, ultra-ridged extruded aluminum AirFrame™, the EFX’s new CLS XStat transducer builds upon the legacy of MartinLogan’s electrostatic heritage with the incorporation of advanced vacuum bonding and MicroPerf stat panels, providing even greater efficiency and precision.
Slim On-Wall Profile
If you won’t settle for anything but electrostats next to your new flatscreen TV, the EFX is the perfect solution at just 6.5-inches deep. Free up precious floorspace by mounting EFX to your wall with the included wall brackets. The EFX is also the ultimate high-performance home theater surround speaker and complements MartinLogan’s entire line of electrostatic loudspeakers. EFX rotates with the pivoting wall bracket to easily focus your surround sound experience.
Advanced Vojtko Filtering
Proprietary Vojtko filtering technology is utilized for EFX’s electrostatic transducer. This audiophile quality network, derived from the CLX, is carefully hand-built using precision point-to-point wiring, polypropylene capacitors, massive air-core coils, and a custom wound E-I core transformer—flawlessly preserving micro-acoustic subtleties while effortlessly handling the broadest range of dynamics contained within even the most demanding sonic source.
Custom 5-Way Binding Posts and Low-Voltage Power Supply
MartinLogan’s proprietary tool-less binding posts simplify cable connection and management. EFX features custom 5-way binding posts and provide the ultimate level of flexibility for connection and setup. To further simplify setup and cable management, the EFX features a low-voltage DC power supply eliminates the need for a traditional, heavy IEC power cord.
Specifications
Specifications are subject to change without notice
Frequency Response
68–22,000 Hz ±3dB
Recommended Amplifier Power
20—300 watts per channel
Horizontal Dispersion
30°
Vertical Dispersion
28″ (71cm) line source
Sensitivity
90 dB/2.83 volts/meter
Impedance
6 Ohms, 1.3 @ 20kHz Compatible with 4, 6, or 8 Ohm rated amplifiers.
Crossover Frequency
530Hz
High Frequency Transducer
XStat™ CLS™ electrostaic transducer » Panel Dimensions: 28″ x 8.6″ (71 x 22cm) » Radiating Area: 241 in² (1,562 cm² )
Low Frequency Transducer
6.5″ (16.5cm) high excursion, fiber cone with extended throw drive assembly; bass reflex
Components
Custom-wound E-I core transformer, air core coils, metal film capacitors
Inputs
Custom 5-way binding posts
Power Draw
Max: 2W each Standby:
This US$1,974 asking price is ambitious, sitting well above the 75th percentile of US$1,254 and significantly higher than the median US$911 from your database of 30 recent listings. While the new retail price for the ElectroMotion EFX generation hovers around US$2,199, a used pair should logically trade closer to the median unless it includes rare extras or is in pristine original-owner condition. At nearly double the median, this listing demands proof of exceptional value to justify the premium over typical market offers.
The EFX remains a compelling choice for enthusiasts seeking MartinLogan’s signature electrostatic clarity in a compact on-wall form, delivering articulate highs and fast response that conventional drivers struggle to match. If this pair is genuinely clean, includes the original mounting hardware, and represents a late-generation ElectroMotion unit rather than an older ESL model, the timing could still make it worthwhile for a buyer prioritizing transparency over bass extension. However, without verified condition details or included accessories, the price leans risky compared to the strong deals available elsewhere in the US$312–US$1,254 range.
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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