ElectroMotion ESL C

A a high-performance electrostatic center channel loudspeaker with a Folded Motion tweeter, sized to fit discreetly within any standard audio-video cabinet.

$1,999.99 each
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The powerful EM-ESL C is a high-performance electrostatic center channel loudspeaker. With the exceptional mid-range dynamics of an electrostatic panel, the remarkable details delivered by a Folded Motion Tweeter, and the addition of a newly-designed CenterForce dual woofer system, the most surprising thing about the EM-ESL C isn’t its superior performance. It’s that the EM-ESL C is compact enough to fit easily into today’s most popular A/V furniture. With the EM-ESL C electrostatic center channel loudspeaker, you can match the acoustic signature of your ElectroMotion Series speakers and build a truly astounding home theater system.

ElectroMotion  ESL C

Expanding the Dynamics of Center Channel Performance

By adding a compact electrostatic panel to a center channel speaker, MartinLogan engineers have succeeded in expanding the performance dynamics of the most important speaker in your home theater system. Your center channel speaker needs to be able to reproduce the finest high frequency details. The midrange must be expansive; to reproduce every whisper of dialogue. Deep bass adds impact to the front-stage effects that anchor the action to your screen. The EM-ESL C accomplishes all this, and more.

The EM-ESL C has a shallow height CLS (Curvilinear Line Source) XStat electrostatic panel wrapped around the front of the speaker enclosure. The gentle horizontal curve of the panel enhances the output of its deceptively compact 114-square-inch radiating area, extending mid-range dispersion patterns and blending the performance seamlessly with your front-stage ElectroMotion loudspeakers.

Just behind the electrostatic panel, in a specially designed housing, sits MartinLogan’s exclusive Folded Motion Tweeter. The low-mass diaphragm of the Folded Motion Tweeter minimizes distortion, and its short excursion length reinforces its lightning fast high frequency response. The 1 x 1.4-inch Folded Motion Tweeter in the EM-ESL C has a total diaphragm area of 9.2-inches, with the ability to reproduce precise details; one of the most important jobs of a center channel speaker.


ElectroMotion  ESL C
ElectroMotion  ESL C
ElectroMotion  ESL C

The New CenterForce™ System

Designing a high performance electrostatic center channel speaker sized to fit into A/V furniture was no easy task. Adding a dual woofer system seemed impossible! But MartinLogan’s skilled audio engineers found a novel solution, and they call it CenterForce.

Instead of taking up space by positioning the woofers on each side of the electrostatic panel, they’ve designed a central slot inside the cabinet for the woofers. Now, the dual woofers reside in a well-braced enclosure located behind the tweeter and electrostatic panel.

This new CenterForce solution allows the speaker to be more compact, and encourages the woofers to produce a generous amount of well-blended deep bass. The CenterForce system in the EM-ESL C features two custom-designed 5.25-inch aluminum cone woofers. Rigid and yet lightweight, this material reduces flexure while minimizing response time. Their efficient construction optimizes suspension and magnetic flux field, further reducing potential sources of distortion. The EM-ESL C grounds its performance in accurate, musical bass response.

This is a center channel speaker that delivers a full-range performance, by combining an electrostatic panel with a Folded Motion Tweeter, bolstered by the CenterForce bass system. The compact EM-ESL C goes where you want it, and does what you need, for your high performance ElectroMotion home theater system.

ElectroMotion  ESL C


Martin Logan ESL X, ESL C, & Dynamo 1600X Electrostatic Speaker Review


TechnoDad ElectroMotion Review Video

Today I give my five-month review of the Martin Logan ESL X, ESL C, and Dynamo 1600X subwoofer.


—Techno Dad, YouTube
Read the full review»

[YouTube Video] Electrostatic Speakers!! Martin Logan ESL X, ESL C, Dynamo 1600X Unboxing & Overview


Check out my unboxing and overview of the Martin Logan ESL X, ESL C, and Dynamo 1600X Subwoofer. Will I make the jump to electrostatic speakers?


—Techno Dad, YouTube
Read the full review»

MartinLogan ElectroMotion ESL X Speaker System Review

"For me, auditioning this ElectroMotion ESL X speaker system was like going home again. The affordable (by MartinLogan standards) electrostatic towers delivered the detailed, lifelike sound I know and love, and the solid foundation provided by the Dynamo 1500X subwoofer enabled them to reach dynamic heights I hadn’t previously experienced in my days as a MartinLogan-phile."

—Al Griffin, Sound & Vision
Read the full review»

MartinLogan ElectroMotion ESL Loudspeakers Reviewed

"They have great value, a unique sound,and are a true gateway to the journey that is the audiophile hobby."

—Jerry Del Colliano, Future Audiophile
Read the full review»



Specifications are subject to change without notice

Frequency Response

66–23,000 Hz ±3dB

Recommended Amplifier Power

20—300 watts per channel

Horizontal Dispersion


Vertical Dispersion

6.375" (16cm) line source


89 dB/2.83 volts/meter


4 Ohms Compatible with 4, 6, or 8 Ohm rated amplifiers.

Crossover Frequency

600, 3400 Hz

High Frequency Transducer

One 1" x 1.4" (2.6cm x 3.6cm) Folded Motion Transducer with 5.25" x 1.75" (13.3cm x 4.4cm) diaphragm.

Mid Frequency Transducer

XStat™ CLS™ electrostaic transducer.
» Panel Dimensions: Two 6.375" x 9" (16.2 x 22.8cm)
» Radiating Area: 114 in² (740 cm²)

Low Frequency Transducer

Two 5.25" (13.3 cm) high excursion, high-rigidity aluminum cone with extended throw driver assembly, non-resonance asymmetrical chamber format.


Custom-wound audio transformer, air core coils, low dcr steel laminate coils, polyester capacitors


Custom 5-way tool-less binding posts


32 lbs. (14.5 kg)


7.6" x 22.8" x 16.1 " (19.3cm x 57.9cm x 40.9cm)

Customer Reviews For ElectroMotion ESL C

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Drew B.

  • Wednesday, June 16, 2021

My front left and right speakers are Martin Logan ESL-X and I owned the Motion 50XTi as the center channel. It's a very nice speaker yet I was curious whether the ESL-C center would be a better match. WOW! there is no comparison. The ESL-C is SO far superior. My front channels are all blended into theater-quality sound. It's an amazing combination. It certainly explains the price differential.