Renaissance ESL 15A
What makes a masterpiece? Is the “Mona Lisa” just a picture of a woman smiling, or is there more to it?
consider something a masterpiece when uncommon skill and artistry
shapes familiar elements in an unexpected way, revealing an essential
MartinLogan, the essential truth revealed by our skill and artistry is
audio realism. Fittingly, our next generation of electrostatic
loudspeakers debuts with the newRenaissance ESL 15A. Three decades of audio design and engineering innovation, distilled into a startling fresh loudspeaker ideal.
A Masterpiece of Design & Engineering
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
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
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
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.
Achieving the Laboratory Standard in Your Own Room
the lab, MartinLogan engineers strive for transparency. Outside the
lab, there’s one wildcard our engineers can never account for: Your
listening room. The unique size and shape of your listening space (and
the size and shape of its contents) can make bass waves do unpredictable
things, greatly affecting a speaker’s overall performance.
the first time in an electrostatic speaker we are introducing the
integration of exclusive Anthem Room Correction (ARC) technology. By
engaging ARC to control the low-frequency curve in relation to the
output of the ESL panel (as seen in this graph), you will experience
performance on par with MartinLogan’s audio test lab.
measures low-frequency sound output in your room and compares it to
optimal response curves that account for spatial anomalies. The advanced
algorithms of ARC then effectively remove the anomalies, leaving only
the ideal standard: realistically blended, natural-sounding bass
performance in your listening space.
minimizing room interactions with PoweredForce Forward bass technology
and the advanced room correction capabilities of ARC, along with its
unique synthesis of the ESL and bass sections, the Renaissance ESL 15A
produces perfectly-etched imaging and focus; optimum natural
reproduction of sound at lifelike listening levels; and agile,
full-range operation in open air.
Clearly, it is this level of ultimate performance that separates the merely excellent from a true masterpiece.
New Ultra-Rigid AirFrame Blade Design
Renaissance ESL 15A 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 AirFrameBlade design enhances imaging, low-level sonic detail, accuracy, and speaker efficiency.
Curvilinear Line Source (CLS) Electrostatic Panel
technology is an essential ingredient of every electrostatic
loudspeaker we produce. Through our proprietary manufacturing method, we
have built-in the panel’s gentle horizontal curvature. This unique
design enhances the high frequency detail produced by the large
radiating surface, without compromising overall sound quality. Notice
how the gentle modern curve and perforation pattern gives way to the
flat grille of the woofer section.
Controlled Dispersion Sound Radiation
sound we hear from a loudspeaker is a combination of direct radiation
from it to our ears, and reflections off of room surfaces—walls, floor,
and ceiling. How our brains integrate this information is far from
simple. Depending on the angle of incidence to the ears and the
arrival-time difference between direct and reflected sound, reflections
can either blur detail and stereo imaging, or enhance the natural
impression of depth and openness.
panels, which are true dipole speakers, produce a nearly-ideal
controlled dispersion radiation pattern. They send very little sound to
the sides, thereby minimizing side-wall reflections, whose short arrival
times tend to interfere with the perception of the direct sound. Their
strong rear radiation, however, produces a generous amount of natural,
ambience-enriching later-arriving mid- and upper register information.
New PoweredForce Forward™ Bass Technology
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.
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
New More performance, versatility, and safety, with WBT Binding Posts
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.
New Powerful Dual 500-Watt Class-D Amplification with 24-Bit Vojtko™ DSP Engine
performance of Renaissance ESL 15A 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 500-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.
dedicated in-house design and engineering team created an extremely
precise 24-bit Vojtko Digital Signal Processing (DSP) engine to work in
conjunction with these powerful new amplifiers. It gives these speakers
the ability to deliver detailed low-frequency performance reaching down
to 22Hz. Advanced DSP allows complete control and performance
optimization over the low pass filters, woofer equalization and limiting
functions, all of which are mapped mathematically in the digital
control of the signal, along with instant response, huge amounts of
clean power, and efficient, integrated performance, paints an original
picture of lifelike audio performance.
Precision-Built Advanced-Topology Vojtko Crossover
Voiced, the advanced crossover and electronics in Renaissance ESL 15A
add enhanced mid-range clarity to this artful composition. Carefully
hand-built using only the finest polypropylene capacitors and air-core
coils, the crossover employs MartinLogan’s proprietary Vojtko topology
for vanishingly low distortion and seamless driver/ESL integration. This
precision-tuned network preserves even the most microscopic sonic
nuances while handling the full dynamics of any source.
also considered the signal you will feed your loudspeakers, and have
engineered Renaissance ESL 15A to work well with practically any type of
electronics. MartinLogan’s state-of-the-art toroidal transformer and
electrical interface engineering ensure an absolutely transparent link
from amplifier to electrostatic panel and woofer array. This produces
sound of unparalleled purity, precision, clarity, and openness — the
next best thing to no speaker at all.