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Parallel
Circuit - A circuit
configuration in which the same
voltage is applied to all
components, with current divided
among the components according to
their respective resistances or
impedances. Example: All positive
leads of two or more speakers
connected together and all
negative leads connected
together. |
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Parametric
- A type of equalizer with
adjustable parameters such as
center frequency and bandwidth
(Q) as well as amplitude. |
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Peta (P)
- A prefix meaning 1015
or 1,000,000,000,000,000 |
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Phase -
The relative position of two
sound waves with respect to each
other. |
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Photo
Detector (photo diode) - A
semiconductor device which
provides variations in current as
a function of light intensity. |
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Piezo
Electric Tweeter - A very
efficient, highly directional
tweeter which operates without a
crossover or magnet. Driver
creates sound when a quartz
crystal receives electrical
energy. |
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Pink Noise
- Sound with all frequencies
perceptible to the human ear
reduced to an equal energy level. |
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Pink Noise
Generator - A device used to
generate pink noise that usually
includes a calibrated microphone. |
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Pit - One
of the depressions that
represents data in a compact
disc. May also be referred to as
bumps, this is what the pick up
sees. |
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Plate Speaker
- A speaker that has two drivers
mounted side by side on a flat
surface. |
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Polarity
- The electrical quality of
having two opposite poles, one
positive and one negative.
Polarity determines the direction
in which a current tends to flow. |
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Pole Mount
- A common automotive speaker
design with the high frequency
driver mounted on a center pole.
Newer designs mount the high
frequency driver in the same
location above the lower
frequency driver with a bridge.
This prevents problems such as
dust and dirt from entering at
the base of the pole. |
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Power
Handling Capability - The
maximum amount of power that can
be safely accommodated without
damage in a speaker system. This
will vary depending on frequency
and length of time the signal is
applied. |
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Pre-amp Fader
- A circuit that allows effective
level control of two amplifiers,
built in and external without
loss of power. |
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Pre-amplifier
(pre-amp) - The circuit which
takes a small signal and
amplifies it to be fed into the
power amplifier for further
amplification. Contains controls
for volume, regulating tone, and
channel balance. |
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