MartinLogan Sequel II - Manual (Page 25)

Page 25 Sequel II User's Manual
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 sensi-
tive.
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 vibra-
tions at the same or nearly the
same frequency from another
body.
Sensitivity Sensitivity Sensitivity Sensitivity Sensitivity. Volume of sound
delivered 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 mechani-
cal 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.
Tweeter Tweeter Tweeter Tweeter Tweeter. A small drive unit designed
to produce only high frequencies.
Wavelength Wavelength Wavelength Wavelength Wavelength. The distance mea-
sured in the direction of progres-
sion 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.