Martin Logan Expression ESL 13A
Martin Logan Expression ESL 13A — 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. It reveals the pure emotional impact of your audio.
Look at the familiar elements of the classic MartinLogan 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, we 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 aluminum 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, we minimize 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 MartinLogan innovation improves your listening experience in any room.
Expression ESL 13A XStat panels are joined to their speaker cabinets using MartinLogan’s redesigned AirFrame Blade construction, precision manufactured from an aerospace-grade extruded aluminum alloy. This material, and this exclusive manufacturing process, makes the panels extremely rigid.
The bold, forward-moving styling of this AirFrame Blade rail system, narrow and strong in front, broad and forceful from the side, is a modern design statement. It never obstructs playable surface area or interferes with the panel’s dipole sound radiation pattern. It also provides electrical and acoustical isolation, minimizing intermodulation distortion caused by vibration and resonance. The flowing lines emphasize the groundbreaking integration of the panel itself with the compact woofer and amplifier section. The breathtaking AirFrame Blade design enhances imaging, low-level sonic detail, accuracy, and speaker efficiency.
PoweredForce Forward bass technology combines two MartinLogan audio innovations: PoweredForce, which allows small enclosures to accurately produce massive amounts of bass, and ForceForward, which significantly reduces performance-robbing front-wall bass reflections.
PoweredForce Forward bass technology uses an advanced crossover topology with phase-timed woofers to minimize destructive reflected energy. By virtually eliminating front-wall bass reflections and working in tandem with the panel, PoweredForce Forward Bass Technology gives you more placement flexibility, and enhances the true audio realism of your sound source.
Connect your electronics safely and securely using 5-Way audiophile WBT Binding Posts. Their pure copper connection plate is highly conductive and free from “eddy current” effects. These posts are insulated for shock protection, and fully damped against vibrations. They give you plenty of room for large-gauge professional speaker connections.
The performance of Expression ESL 13A has been reconsidered from the ground up. Taking full advantage of innovations like PoweredForce Forward and ARC Technology, and the integration of the electrostatic panel with the woofer array, required daring thinking about power and efficiency. Our new dual 300-watt amplifiers produce clean power, in a small space, more efficiently than ever before. They enable the effortless delivery of exhilarating dynamic impact, with plenty of overhead. Superior, reliable Class-D technology means there’s virtually no energy lost between the amplifiers and the woofers.
Frequency Response: 24–23,000 Hz ±3dB
Horizontal Dispersion: 30°
Vertical Dispersion: 44" (112cm) line source
High Frequency Transducer: XStat™ CLS™ electrostatic transducer
» Panel Dimensions: 44" × 13" (112 × 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.
Room Correction (Bass Section): Anthem Room Correction (ARC™) ready (Sold Separately)
Amplifier: Woofer: 2 x 300 watts/channel (4 ohms), 2 x 600 watts peak
Sensitivity: 91 dB/2.83 volts/meter
Impedance: 4 Ohms, 0.7 at 20kHz. Compatible with 4, 6, or 8 Ohm rated amplifiers.
Recommended Amplifier Power: 20‒600 watts per channel
Crossover Frequency: 300 Hz
Components: Custom-wound audio transformer, air core coils, polypropylene capacitors. 24-bit DSP based preamplifier (used with woofer amplifier).
Bass: ±10 dB under 75 Hz
Mid-Bass: –2 dB, 0 db, +2 db
Light: On, Dim, Off
ARC™ Room EQ: On, Off
Lighting: LED intensity control: on, dim, 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
Weight: 103 lbs.
Dimensions: 61.5" × 13.4" × 27.5"
MSRP: $14,995 pr.
If you are interested in this product or have questions, please call 1-714-630-4100.
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