MartinLogan ElectroMotion ESL Electrostatic Loudspeaker - Satin Black - Each

MartinLogan's Entry Point Into Electrostatic Sound

The MartinLogan ElectroMotion ESL pairs a 34-inch XStat electrostatic panel — MartinLogan's own Curvilinear Line Source design, with 292 square inches of radiating surface — with a single 8-inch passive woofer in a ported cabinet.

MartinLogan rates sensitivity at 91 dB into a nominal 6 ohms, dipping as low as 1.6 ohms at 20 kHz, and recommends 20 to 300 watts of amplifier power — amplifier stability into a varying load matters more than raw wattage.

The panel is finished in Gloss Black or Satin Black and sold each, so a stereo pair is two. A low-voltage power supply, included, plugs into a nearby outlet to charge the panel.

Where the Electrostatic Panel Earns Its Keep

A Line-Source Panel Above a Passive Woofer

The 34-inch XStat panel radiates like a line source rather than a point source, crossing over at 500 Hz to a single 8-inch passive woofer in a bass-reflex cabinet below it. Unlike MartinLogan's more expensive hybrid towers, the ElectroMotion ESL's woofer carries no onboard amplifier of its own.

The panel needs open space to radiate front and back — MartinLogan recommends at least 2 to 3 feet of clearance from the wall behind it, more than a typical dynamic tower needs.

The Numbers, and What They Ask of Your Amplifier

MartinLogan quotes a frequency range of 42 Hz to 22 kHz within 3 dB. Sensitivity is 91 dB, nominal impedance is 6 ohms, dipping to 1.6 ohms at 20 kHz — MartinLogan's own manual notes that an amplifier stable into a varying load matters more here than its wattage rating alone.

A single pair of binding posts accepts banana plugs, spades, or bare wire; there is no bi-wire terminal on this model. The included low-voltage power supply draws about 8 watts, idle, for a pair.

What Reviewers Are Saying

Brent Butterworth, Sound & Vision, called it "one of the best bargains going in an audiophile music speaker," praising its "huge soundstaging and a dramatic presentation" alongside "neutral tonal balance and natural sound."

Hans Wetzel, GoodSound.com, agreed: "the ElectroMotion isn't perfect, but its qualities are manifest to my ears. There is no other product like it" anywhere near its price.

Who Is This Floorstanding Speaker Best For?

• You want a genuine entry point into MartinLogan's electrostatic technology — the same XStat panel science used in MartinLogan's flagship models, at the most accessible price
• Soundstage and imaging matter more to you than raw scale — reviewers praised its "huge soundstaging" and natural tonal balance
• You have room to give the panel space — it wants 2 to 3 feet of clearance from the wall behind it to radiate properly
• You want one speaker per cabinet, priced and shipped that way — the ElectroMotion ESL is sold each, so order two for a stereo pair
• You want deep bass without stepping up to a larger electrostatic model — the single passive woofer reaches to 42 Hz within 3 dB on its own. For the deepest home-theater effects, add one of our subwoofers and let the towers do what they do best

How Does It Connect to Your System?

Give each panel 2 to 3 feet of clearance from the wall behind it and about 2 feet from side walls, so the electrostatic panel has room to radiate in both directions. Plug the included low-voltage power supply into a nearby outlet — an automatic sensor only charges the panel while music plays.

Keep the panel out of direct sunlight and away from dust or smoke, and never spray cleaner near it; a dry, soft cloth is all it needs.

Two cables, two power supplies, two speakers, and you are listening.

Pairs Well With

What finishes the system around a pair of ElectroMotion ESL towers:

• Stereo amplifiers — a stable amplifier that handles the panel's varying impedance is more important than raw watts
• Integrated amplifiers — a quality integrated amplifier in the 20 to 300 watt range MartinLogan recommends
• Speaker cables — single-wire runs, since this model has no bi-wire terminal
• Power conditioners — each panel's low-voltage power supply draws its own AC power

Frequently Asked Questions

Is the price for one speaker or a pair?

One. The ElectroMotion ESL is sold each, so order two for a stereo pair, or one to match an existing speaker.

Do these need to be plugged into a wall outlet?

Yes. Each panel needs its included low-voltage power supply plugged in to charge the electrostatic element; a pair draws about 8 watts at idle, far below any household circuit's limit.

What amplifier do I need?

MartinLogan recommends 20 to 300 watts of amplifier power. Because the panel's impedance varies with frequency, an amplifier that stays stable into a varying load matters more than its peak wattage rating.

Can I bi-wire the ElectroMotion ESL?

Each panel has a single pair of binding posts, wired straight through without a separate bi-wire path.

How is this different from the ElectroMotion ESL X?

The ESL X steps up to a larger 40-inch panel and two passive woofers instead of one, plus bi-wire binding posts, for more scale and output, at a higher price.

How do I care for the electrostatic panel?

The same basics as any MartinLogan panel: no direct sunlight, no spray cleaners, and only an occasional dusting with a dry, soft cloth.

See It in Action

Andrew Robinson reviews the ElectroMotion ESL:

Audio Advisor's own channel takes a look at the ElectroMotion ESL:

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Learn More

Want to learn more about electrostatic speaker placement, amplifier matching, or setting up a hybrid electrostatic system? Visit our Learning Center for guides, tips, and expert advice.