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Quest User's Manual
Martin-Logan Exclusives
Critical ZoneCritical Zone
Critical ZoneCritical Zone
Critical Zone
250 - 20kHz250 - 20kHz
250 - 20kHz250 - 20kHz
250 - 20kHz
TweeterTweeter
TweeterTweeter
Tweeter
MidrangeMidrange
MidrangeMidrange
Midrange
WooferWoofer
WooferWoofer
Woofer
Critical ZoneCritical Zone
Critical ZoneCritical Zone
Critical Zone
250 - 20kHz250 - 20kHz
250 - 20kHz250 - 20kHz
250 - 20kHz
WooferWoofer
WooferWoofer
Woofer
QuestQuest
QuestQuest
Quest
ElectrostaticElectrostatic
ElectrostaticElectrostatic
Electrostatic
TransducerTransducer
TransducerTransducer
Transducer
Martin-Logan
QuestQuest
QuestQuest
Quest Loudspeaker
Conventional Loudspeaker
Figure 1. Figure 1.
Figure 1. Figure 1.
Figure 1. Illustrates how a conventional speaker system
must use a crossover network that has negative affects
on the musical performance, unlike the Quest which
needs no crossover networks in the "critical zone".
Full Range OperationFull Range Operation
Full Range OperationFull Range Operation
Full Range Operation
The most significant advantage of Martin-Logan's
exclusive transducer technology reveals itself when you
compare to examples of other loudspeaker products on
the market today.
The Quest uses no crossover networks above 150 Hz
because they are not needed. It consists of a single,
seamless electrostatic membrane reproducing all
frequencies above 150 Hz simultaneously. How is this
possible?
First, it is important to understand that music is not
of music and then combined electrically so that the sum of
the parts equals the total signal. While this sounds nice in
theory, a different story unfolds in real-world conditions.
In order to use multiple drivers, a crossover network is
enlisted to divide the complex musical signal into the
separate parts (usually highs, mids, and lows) that each
specific driver was designed to handle. Unfortunately,
due to the phase relationships that occur within all
crossover networks and during the acoustical recombina-
tion process, nonlinearities and severe degradation of the
music signal takes place in the ear's most "critical zone".
See Figure 1
.
So, music in the "critical
zone" becomes delayed in
time. These delays can be
picked-up by your ear and
result in poor imaging and
ambience cues.
The Quest's electro-The Quest's electro-
The Quest's electro-The Quest's electro-
The Quest's electro-
static transducer canstatic transducer can
static transducer canstatic transducer can
static transducer can
single-handedly repro-single-handedly repro-
single-handedly repro-single-handedly repro-
single-handedly repro-
duce all frequenciesduce all frequencies
duce all frequenciesduce all frequencies
duce all frequencies
above 150 Hz simulta-above 150 Hz simulta-
above 150 Hz simulta-above 150 Hz simulta-
above 150 Hz simulta-
neously.neously.
neously.neously.
neously.
The crossover phase
discontinuities that are
associated with traditional
tweeter, midrange, and
woofer systems are elimi-
nated in the Quest. This
results in a
dramaticdramatic
dramaticdramatic
dramatic
improvement in imagingimprovement in imaging
improvement in imagingimprovement in imaging
improvement in imaging
and staging perform-and staging perform-
and staging perform-and staging perform-
and staging perform-
ance due to the mi-ance due to the mi-
ance due to the mi-ance due to the mi-
ance due to the mi-
nutely accurate phasenutely accurate phase
nutely accurate phasenutely accurate phase
nutely accurate phase
relationship of the full-relationship of the full-
relationship of the full-relationship of the full-
relationship of the full-
range panel waverange panel wave
range panel waverange panel wave
range panel wave
launch.launch.
launch.launch.
launch.
composed of separate high,
mid and low frequency
pieces. In fact, music is
comprised of a single
complex waveform with all
frequencies interacting
simultaneously.
The electrostatic transducer
of the Quest essentially acts
as an exact opposite of the
microphones used to record
the original event. A
microphone, which is a
single working element,
transforms acoustic energy
into an electrical signal that
can be amplified or pre-
served by some type of
storage media. The Quest's
electrostatic transducer
transforms electrical energy
from your amplifier into
acoustical energy with a
single membrane.
Upon looking carefully at a
traditional magnetic driver
(i.e. dynamic, ribbon,
induction), no single unit can
reproduce the full range of
frequencies. Instead, these
drivers must be designed to
operate within narrow areas