Martin Logan Expression ML 13AMartin Logan Expression ML 13A
Martin Logan

Expression ESL 13A Electionstatic Speakers

The Expression ESL 13A is part of the Masterpiece Series. It features a dual 10-inch woofer system with ARC-honed performance, for perfectly blended low-frequency response. The groundbreaking integration of this woofer array with MartinLogan’s signature 13-inch wide XStat CLS Transducer, coupled with a powerful dual amplifier section, delivers an expressive and dynamic audio experience, with less coloration.

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Description

Audio is both real, and imagined. There is the fact of the sound. And there is the feeling that the sound arouses within us.

This feeling is the inspiration behind the new Expression ESL 13A. Like the Expressionist masterpieces, this artful presentation of audio is focused solely on intensifying your emotional experience. It’s a virtually transparent audio performance that transports you to a new landscape of the senses.

Look at the familiar elements of the classic Martin Logan electrostatic loudspeaker: Advanced MicroPerf stator technology, which allows for almost twice the exposed electrostatic diaphragm surface as a traditional electrostatic panel of the same size. The panel is reinforced with rigid ClearSpar™ spacers, keeping an exact level of tension on the vacuum-bonded diaphragm without obscuring the beautiful see-through design. Add the slender, pointed-arrow design of the new AirFrame™ Blade construction; a powerfully evocative composition creating a harmonious connection between the panel and its woofer cabinet.

Now notice some radical refinements: Inspired by our own breakthrough design, Martin Logan have reinvented the Expression ESL 13A woofer section, powered by new dual 300-watt Class-D amplifiers, and controlled by a 24-Bit Vojtko™ DSP Engine and ARC™ (Anthem Room Correction).

Using two 10-inch laser-engineered low-distortion aluminium cone woofers in independently enclosed compact chambers, exclusive PoweredForce Forward™ bass alignment technology controls the interaction between the rear-firing woofer and the wall behind that woofer. With smart phase-shifting logic, they minimise the effect that wall has on bass information that might bounce back into the listening room. This uniform frequency response results in realistic bass effects you can feel. It’s one more way Martin Logan innovation improves your listening experience in any room.

Frequency Response
24–23,000 Hz ±3dB

Recommended Amplifier Power
20—600 watts per channel

Horizontal Dispersion
30°

Vertical Dispersion
44″ (112cm) line source

Sensitivity
91 dB/2.83 volts/meter

Impedance
4 Ohms, 0.7 at 20kHz Compatible with 4, 6, or 8 Ohm rated amplifiers.

Crossover Frequency
300Hz

High Frequency Transducer
XStat™ CLS™ electrostatic transducer » Panel Dimensions: 44″ x 13″ (112 x 33cm) » Radiating Area: 572 in² (3,696 cm² )

Low Frequency Transducer
Two 10” (25.4 cm) cast basket, high excursion, rigid aluminium cone and extended throw drive assembly, non-resonance asymmetrical chamber format.

Amplifier
Woofer: 2 x 300 watts/channel (4 ohms), 2 x 600 watts peak

Room Correction (Bass Section)
Anthem Room Correction (ARC™) ready (Sold Separately)

Components
Custom-wound audio transformer, air core coils, polypropylene capacitors. 24-bit DSP based preamplifier (used with woofer amplifier)

Audio Controls
Bass: ±10 dB under 75 Hz Mid-Bass: –2 dB, 0 db, +2 db Light: On, Dim, Off ARC™ Room EQ: On, Off

Signal Inputs
WBT-0703Cu nextgen™ 5-way binding posts feature a filigree signal conductor made from gold plated, nickel free, non- ferromagnetic, pure copper for high conductivity and fully insulated. Free from eddy current effects.

Inputs
AC Power, RJ45 (for ARC), mini USB (for ARC)

Power Draw
Idle: < 1W/channel Max: 500W/channel

Lighting
LED intensity control: on, dim, off

Weight
103 lbs. (46.8 kg)

Dimensions
61.5″ x 13.4″ x 27.5 ” (156.1cm x 33.9cm x 69.9cm)