The MartinLogan Impression ESL 11A is a reference-class hybrid electrostatic loudspeaker that combines the legendary transparency of MartinLogan's XStat™ electrostatic technology with powerful built-in bass amplification and advanced digital signal processing. As part of the prestigious Masterpiece Series, the Impression ESL 11A features a full-size 44-inch electrostatic transducer, dual powered 8-inch aluminum woofers, and Anthem Room Correction (ARC™) compatibility, delivering extraordinary realism, deep bass extension, and room-filling dynamics for both music and home theater applications.
At its core is MartinLogan's XStat™ CLS™ Curvilinear electrostatic panel enhanced with MicroPerf™ stator technology, which increases the active diaphragm area without enlarging the speaker's physical footprint. The ultra-light electrostatic diaphragm reproduces voices and instruments with exceptional speed, transparency, and virtually nonexistent distortion, while the proprietary 24-bit Vojtko™ DSP engine and precision-built crossover ensure seamless integration between the electrostatic panel and the powered woofer system. The result is a remarkably coherent presentation with pinpoint imaging, expansive soundstaging, and lifelike tonal accuracy.
Low-frequency performance is handled by two high-excursion 8-inch aluminum woofers powered by dedicated dual 275-watt Class-D amplifiers utilizing MartinLogan's exclusive PoweredForce Forward™ bass alignment technology. This innovative design minimizes rear-wall interactions while the built-in DSP optimizes bass response and supports Anthem Room Correction (ARC™) for precise room calibration. Adjustable bass and mid-bass controls allow further fine-tuning, enabling the Impression ESL 11A to deliver tight, articulate bass extending down to an impressive 29 Hz with outstanding authority and control.
Designed for the most demanding audiophiles, the Impression ESL 11A combines state-of-the-art electrostatic technology, active bass amplification, and sophisticated acoustic engineering into a visually striking loudspeaker. Its rigid AirFrame Blade™ architecture, premium WBT binding posts, and handcrafted crossover components complement its extraordinary sonic capabilities, creating a speaker that delivers breathtaking musical realism and immersive home theater performance worthy of MartinLogan's Masterpiece designation.
- Component type: Hybrid electrostatic powered floorstanding speaker
- High-frequency / midrange driver: 44-inch × 11-inch XStat™ CLS™ Curvilinear Electrostatic Transducer with MicroPerf™ technology
- Electrostatic radiating area: 484 sq in (3,136 cm²)
- Low-frequency drivers: Dual 8-inch high-excursion rigid aluminum cone woofers with cast baskets
- Built-in amplifier: Dual 275 W Class-D amplifiers (550 W peak each) dedicated to the woofer section
- Frequency response: 29 Hz – 23 kHz (±3 dB)
- Sensitivity: 91 dB (2.83V/1m)
- Impedance: 4 ohms (0.6 ohms minimum at 20 kHz)
- Recommended amplifier power: 20–550 W per channel
- Crossover frequency: 300 Hz
- Horizontal dispersion: 30°
- Vertical dispersion: 44-inch line source
- Audio controls: Bass level (±10 dB below 75 Hz), Mid-Bass (-2 dB / 0 dB / +2 dB), ARC™ On/Off
- Room correction: Anthem Room Correction (ARC™) Ready
- Inputs: WBT-0703Cu nextgen™ 5-way binding posts, AC power, RJ45 (ARC), Mini USB (ARC)
- Enclosure: PoweredForce Forward™ bass alignment with non-resonant asymmetrical chamber
- Dimensions (H × W × D): 60.75 × 11.9 × 27.4 in (154.3 × 30.2 × 69.6 cm)
- Weight: 90 lb (40.9 kg) each
- Finishes: Gloss Black, Dark Cherrywood
- Design features: XStat™ CLS™ electrostatic panel, MicroPerf™ stator technology, PoweredForce Forward™ bass system, 24-bit Vojtko™ DSP engine, AirFrame Blade™ construction, custom-wound audio transformer