Norman Audio

MartinLogan Expression ESL 13a walnut finish (Demo Unit)

Year end clearance.
Normal retail price: $24,000

Sale Price: $12,000

Expression ESL 13A is the artful presentation of audio focused solely on intensifying your emotional experience. 

MartinLogan Expression ESL 13a - Norman Audio

Featuring a 13-inch (CLS™) XStat™ electrostatic transducer, dual 10-inch PoweredForce Forward™ woofers powered by dual 300-watt Class-D amplifiers, and controlled by a 24-Bit Vojtko™ DSP Engine and ARC™ (Anthem Room Correction).


Distilling nearly forty years of innovative audio design and engineering into a startlingly fresh loudspeaker ideal.Expression ESL 13A represents a major evolution of our classic electrostatic loudspeaker. All of the familiar elements are here, along with some revolutionary refinements. At the heart of this exceptional loudspeaker you’ll find a 13-inch Curvilinear Line Source (CLS™) XStat™ vacuum-bonded electrostatic transducer with advanced MicroPerf™ stator technology and ultra-rigid AirFrame™ Blade construction. The powerfully dynamic low-frequency experience is rendered with unflinching accuracy and authority courtesy of dual 10-inch low-distortion aluminum cone woofers. Each woofer is independently powered by a 300-watt Class-D amplifier, and controlled by a 24-Bit Vojtko™ DSP Engine featuring Anthem Room Correction (ARC™) technology.


Frequency Response24–23,000 Hz ±3dB
Recommended Amplifier Power20—600 watts per channel
Horizontal Dispersion30°
Vertical Dispersion44″ (112cm) line source
Sensitivity91 dB/2.83 volts/meter
Impedance4 Ohms, 0.7 at 20kHz Compatible with 4, 6, or 8 Ohm rated amplifiers.
Crossover Frequency300Hz
High Frequency TransducerXStat™ CLS™ electrostatic transducer » Panel Dimensions: 44″ x 13″ (112 x 33cm) » Radiating Area: 572 in² (3,696 cm² )
Low Frequency TransducerTwo 10” (25.4 cm) cast basket, high excursion, rigid aluminium cone and extended throw drive assembly, non-resonance asymmetrical chamber format.
AmplifierWoofer: 2 x 300 watts/channel (4 ohms), 2 x 600 watts peak
Room Correction (Bass Section)Anthem Room Correction (ARC™) ready (Sold Separately)
ComponentsCustom-wound audio transformer, air core coils, polypropylene capacitors. 24-bit DSP based preamplifier (used with woofer amplifier).
Audio ControlsBass: ±10 dB under 75 Hz Mid-Bass: –2 dB, 0 db, +2 db Light: On, Dim, Off ARC™ Room EQ: On, Off
Signal InputsWBT-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.
InputsAC Power, RJ45 (for ARC), mini USB (for ARC)
Power DrawIdle: < 1W/channel Max: 500W/channel
LightingLED intensity control: on, dim, off
Weight103 lbs. (46.8 kg)
Dimensions61.5″ x 13.4″ x 27.5 ” (156.1cm x 33.9cm x 69.9cm)


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