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Monolith III User's Manual

value.

Inductance

Inductance

Inductance

Inductance

Inductance. The property of an

electric circuit by which a varying
current in it produces a varying

magnetic field that introduces

voltages in the same circuit or in
a nearby circuit. It is measured in

henrys.

Inductor

Inductor

Inductor

Inductor

Inductor. A device designed primarily

to introduce inductance into an

electric circuit. Sometimes called
a choke or coil.

Linearity

Linearity

Linearity

Linearity

Linearity. The extent to which any

signal handling process is

accomplished without amplitude

distortion.

Midrange

Midrange

Midrange

Midrange

Midrange. The middle frequencies

where the ear is the most
sensitive.

Passive crossover

Passive crossover

Passive crossover

Passive crossover

Passive crossover. Uses no active

components (transistors, IC’s,

tubes) and needs no power

supply (AC, DC, battery) to
operate. The crossover in a

typical loudspeaker is of the

passive variety. Passive cross-
overs consist of capacitors,

inductors and resistors.

Phase

Phase

Phase

Phase

Phase. The amount by which one

sine wave leads or lags a second

wave of the same frequency. The
difference is described by the

term phase angle. Sine waves in

phase reinforce each other; those
out of phase cancel.

Pink noise

Pink noise

Pink noise

Pink noise

Pink noise. A random noise used in

measurements, as it has the
same amount of energy in each

octave.

Polarity

Polarity

Polarity

Polarity

Polarity. The condition of being

positive or negative with respect

to some reference point or object.

RMS

RMS

RMS

RMS

RMS. Abbreviation for root mean

square. The effective value of a
given waveform is its RMS value.

Acoustic power is proportional to

the square of the RMS sound
pressure.

Resistance

Resistance

Resistance

Resistance

Resistance. That property of a

conductor by which it opposes

the flow of electric current,

resulting in the generation of heat
in the conducting material,

usually expressed in ohms.

Resistor

Resistor

Resistor

Resistor

Resistor. A device used in a circuit

primarily to provide resistance.

Resonance

Resonance

Resonance

Resonance

Resonance. The effect produced

when the natural vibration

frequency of a body is greatly
amplified by reinforcing vibrations

at the same or nearly the same

frequency from another body.

Sensitivity

Sensitivity

Sensitivity

Sensitivity

Sensitivity. Volume of sound deliv-

ered for a given electrical input.

Stator

Stator

Stator

Stator

Stator. The fixed part forming the

reference for the moving dia-
phragm in a planar speaker.

THD

THD

THD

THD

THD. Abbreviation for total harmonic

distortion. (See Distortion.)

TIM

TIM

TIM

TIM

TIM. Abbreviation for transient

intermodulation distortion. (See
Distortion.)

Transducer

Transducer

Transducer

Transducer

Transducer. Any of various devices

that transmit energy from one

system to another, sometimes

one that converts the energy in
form. Loudspeaker transducers

convert electrical energy into

mechanical motion.

Transient

Transient

Transient

Transient

Transient. Applies to that which lasts

or stays but a short time. A
change from one steady-state

condition to another.

Transmit

Transmit

Transmit

Transmit

Transmit. To cause sound to pass

through air or some other

medium.

Tweeter

Tweeter

Tweeter

Tweeter

Tweeter. A small drive unit designed

to produce only high frequencies.

Wavelength

Wavelength

Wavelength

Wavelength

Wavelength. The distance measured

in the direction of progression of
a wave, from any given point

characterized by the same phase.

White noise

White noise

White noise

White noise

White noise. A random noise used in

measurements, as it has the

same amount of energy at each
frequency.

Woofer

Woofer

Woofer

Woofer

Woofer. A drive unit operating in the

bass frequencies only. Drive

units in two-way systems are not

true woofers but are more
accurately described as being

mid/bass drivers.

Summary of Contents for Monolith III

Page 1: ...The Monolith III Speaker System User s Manual...

Page 2: ...stration with your speakers you cannot be assured of having received new units If this is the case please contact Martin Logan We know you are anxious to listen to your new speakers So to speed you al...

Page 3: ...ults The fruit of this labor has brought us the passive IIIp INTERFACE and the superior electronic IIIx CROSSOVER With either of these two devices the transition from the electro static element to the...

Page 4: ...l of the speaker and then to the wall outlet Extension cords may be used if necessary since the AC power requirement of the Monolith is extremely small Step 3 Signal Connection Step 3 Signal Connectio...

Page 5: ...olts meter Weight Weight Weight Weight Weight 120 lbs speaker 54 4 kg speaker Size Size Size Size Size HWD 73 75 x 26 75 x 11 75 187 3cm x 67 9cm x 29 8cm Components Components Components Components C...

Page 6: ...rrowed the field of contestants down to the cone and the electrostat The outcome would dictate the way that future generations would refer to loudspeakers as being either conven tional or exotic Bell...

Page 7: ...s performance it presented a difficult load that some amplifiers did not like its dispersion was very directional and its power handling was limited to around 70 watts As a result many people continue...

Page 8: ...ng and operating the speakers Substantially impaired perform ance or severe damage may occur to a Martin Logan speaker if operation is attempted from an incorrect AC power source If your home is not e...

Page 9: ...one set of wires to the HI HI HI HI HI and HI HI HI HI HI binding posts of the IIIp INTERFACE Then connect a second set of wires to the LO LO LO LO LO and LO LO LO LO LO binding posts Next connect bot...

Page 10: ...o amplifiers or two mono amplifiers and one stereo amplifier Get the idea here With either form of passive bi amplification your pre amplifier must have dual outputs If your pre amplifier is not so eq...

Page 11: ...ropriate left and right inputs of both amplifiers See Figure 3a With vertical bi amping vertical bi amping vertical bi amping vertical bi amping vertical bi amping each of the stereo amplifiers is ded...

Page 12: ...er because all frequency division of the signal is done at line level at very low power millivolts with active components transistors This configuration has several advan tages With the frequency divi...

Page 13: ...ter all signal connections have been signal connections have been signal connections have been signal connections have been signal connections have been made and you have verified that made and you ha...

Page 14: ...is labeled frequency and the right control is labeled boost cut See Figure 6 These are a very accurate and precise pair of controls that allow you to adjust your speakers output in the most problemat...

Page 15: ...ame frequency as that of the worst offender and adjust the boost cut control to its appropriate position either up to cancel a void or down to cancel a peak you should begin to establish a smooth prog...

Page 16: ...ave a much higher output impedance In addition many cables can change the preamplifiers output characteristics In order to assure a high level of performance with all types of preamps and cables the M...

Page 17: ...namic cone drive a high Q driver in a large tuned usually ported box is required The trade off with this approach is poor speed acceleration and damping of the woofer driver The superior performance o...

Page 18: ...s phenomenon Reflective Surfaces Reflective Surfaces Reflective Surfaces Reflective Surfaces Reflective Surfaces The hard surfaces of your room particularly if close to your speaker system will reflec...

Page 19: ...in Logan electrostatic loudspeakers are known as bipolar radiators This means that they produce sound from both their fronts and their backs Consequently musical information is reflected by the wall b...

Page 20: ...g with a wide listeningarea Eventhoughtheysufferfrom venetian blind effect angled multiple panel speakers can deliver good imaging but only to specific spots in the listen ing area Ascanbeseen pointso...

Page 21: ...y with deeper bass and more spacious highs resulting After a few days of listening you can begin to make refine ments and hear the differences of those refinements The Back Wall The Back Wall The Back...

Page 22: ...imaging is more open and spacious and the bass response tightened that is a superior position Move the speakers back six inches from the initial set up position Again listen to the imaging and bass r...

Page 23: ...they sound for years to come Do not spray any cleaning solutions on the electrostatic element as this could impair the speakers performance Dust may be removed with a brush attachment on a vacuum cle...

Page 24: ...e then applied to the stators The resulting electrostatic field created by the opposing high voltage on the stators works simultane ously with and against the diaphragm consequently moving it back and...

Page 25: ...d damped and close to massless Unfortunately these condi tions are not available in our world today To make these cones and domes move all electromagnetic drivers must use voice coils wound on formers...

Page 26: ...in imaging and staging performance due to the minutely accurate phase relationship of the full range panel wave launch Critical Zone Critical Zone Critical Zone Critical Zone Critical Zone 250 20kHz...

Page 27: ...er with the inherent speed and accuracy of an electrostatic panel Since then refinements in the actual driver assemblies crossover compo nents and materials used in the construction of our hybrid spea...

Page 28: ...o be any interaction Is there likely to be any interaction Is there likely to be any interaction Is there likely to be any interaction Is there likely to be any interaction between the Monoliths and t...

Page 29: ...y be vacuumed off with a brush attachment connected to your vacuum cleaner or you may blow them off with compressed air DO NOT SPRAY ANY KIND OF CLEANING AGENT ON OR IN CLOSE PROXIMITY TO THEM No Outp...

Page 30: ...el A numerical expression of the relative loudness of a sound The difference in decibels between two sounds is ten times the common logarithm of the ratio of their power levels DC DC DC DC DC Abbrevia...

Page 31: ...by which it opposes the flow of electric current resulting in the generation of heat in the conducting material usually expressed in ohms Resistor Resistor Resistor Resistor Resistor A device used in...

Page 32: ...3 00 2001 delaware street p o box 741 lawrence kansas 66044 phone 913 749 0133 fax 913 749 5320 1989 Martin Logan Ltd All rights reserved...

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