6 Introduction
Congratulations! You have invested in one of the world’s
premier loudspeaker systems.
The MartinLogan Spire™ represents an advanced
combination of sonic technologies establishing an unprec-
edented direction for audiophile design. The result of
years of research, the new Spire™ hybrid electrostat-
ic loudspeaker features PoweredForce™ and XStat™
technologies, dramatically reducing cabinet size, yet
establishing new standards for efficiency, dynamics and
precision in a floorstanding loudspeaker.
The luminous legacy of MartinLogan subwoofer engi-
neering and research not only produced some of the
world’s most sophisticated subwoofers, but has also
yielded new breakthroughs. Through integrated engineer-
ing of advanced amplification and transducer designs,
PoweredForce™ bass technology results in usable bass
extension down to 29Hz, immense bass dynamics and
precision beyond the reach of traditional passive box sys-
tems—all from an enclosure not much larger than a case of
wine! Additionally, low-frequency equalization capabili-
ties, integrated into advanced PoweredForce™ technology,
allow precision calibration for optimal room integration.
Housed within a radical, ultra-rigid extruded aluminum
AirFrame™, the Spire’s™ CLS XStat™ transducer builds
upon the legacy of MartinLogan’s electrostatic heritage
with the incorporation of advanced vacuum bonding and
MicroPerf stat panels, providing even greater efficiency and
precision. The integration electrical interface technology
developed by MartinLogan’s Statement™ e2 engineering
team extends effortless dynamics and purity, resulting in
even higher sonic standards of efficiency and precision.
Featuring an advanced crossover topology derived from
the Statement™ loudspeaker, MartinLogan carefully
hand-builds each Spire™ crossover utilizing precision
point-to-point wiring, audiophile-grade polypropylene
capacitors and high-purity air-core coils. This advanced
crossover topology flawlessly preserves microscopic sub-
tleties while effortlessly handling the broadest range of
dynamics contained within even the most demanding
sonic source.
The materials in your new Spire speakers are of the high-
est
quality and will provide years of enduring enjoyment
and
deepening respect. The cabinetry is constructed
from the highest quality composite material for acoustical
integrity and features hand rubbed wood veneers.
Through rigorous testing, the curvilinear electrostatic
panel has proven itself to be one of the most durable and
reliable transducers available today. Fabricated from a
custom tool punched high-grade steel, the patented
panel is then coated with a special polymer that is applied
via a proprietary electrostatic bonding process. This panel
assembly houses a membrane just 0.0005 of an inch thick.
Ruggedly constructed and insulated, the panel is rated to
easily handle up to 250 watts of continuous power with
no deleterious effects.
The other sections of your User’s Manual explain in detail
the operation of your Spire speakers and the philosophy
applied to their design. A clear understanding of your
speakers will insure that you obtain maximum performance
and pleasure from this most exacting transducer. It has been
designed and constructed to give you years of trouble-free
listening enjoyment.
IntroduCtIon
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