What makes a masterpiece? Is the "Mona Lisa” just a picture of a woman smiling, or is there more to it?
We consider something a masterpiece when uncommon skill and artistry shapes familiar elements in an unexpected way, revealing an essential truth.

For MartinLogan, the essential truth revealed by our skill and artistry is audio realism. Fittingly, our next generation of electrostatic loudspeakers debuts with the new Renaissance ESL 15A. Three decades of audio design and engineering innovation, distilled into a startling fresh loudspeaker ideal.

A Masterpiece of Design & Engineering

Befitting a loudspeaker of this name, MartinLogan has combined decades of innovations, and more, to reinterpret the uniquely detailed electrostatic loudspeaker. This is a flagship audio achievement for the 21st Century.
The pièce de résistance is the integration of MartinLogan’s award-winning 15-inch wide Curvilinear Line Source (CLS™) XStat™ electrostatic (ESL) transducer with its robust woofer section, the revolutionary melding of design and engineering.

Hi-Fi News Yearbook 2017 - Outstanding Product

System Frequency Response
22–21,000 Hz ±3 dB

Recommended Amplifier Power
50–700 Watts per channel at 4 ohms

Horizontal: 30 degrees
Vertical: 46” (116.9 cm) line source

92 dB / 2.83 volts / meter

Nominal: 4 ohms, 0.5 ohms @ 20 kHz

Crossover Frequency
300 Hz

High/Mid Frequency Driver
XStat CLS Electrostatic transducer

Panel dimensions: 46” x 15” (116.9 cm x 38.1 cm)

Radiating area: 690 in2 (4,454 cm2)

Two 12” (30.5 cm) cast basket, high excursion, rigid aluminium cone with extended throw drive assembly, non-resonance asymmetrical chamber format

Woofer: 2 x 500 watts / channel (4 ohms),
2 x 1,000 watts peak

Room Correction (Woofer System)
Anthem Room Correction (ARC™) ready
(Sold Separately)

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

Signal Inputs
WBT-0703 Cu 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

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

Power Draw
Max: 900 W per channel
Standby: <0.5 W per channel

140 lbs. each (63.5 kg)

Size (H x W x D)
69.8” x 15.75” x 28.9” (177.3 cm x 40 cm x 63.3 cm)

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 Renaissance ESL 15A woofer section, powered by new dual 500-watt Class-D amplifiers, and controlled by a 24-Bit Vojtko™ DSP Engine and ARC™ (Anthem Room Correction).
Using two 12-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.
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