Ticking Noise When Engine On; Glossary - Clarion APX2180 Owner's Manual

Ticking noise when engine on
• High voltage ignition problem: Check for problems with the ignition system and
replace components as required.
• Cracked distributor caps
• Carbon traces on plug wires
• Loose spark plugs
Crossover. A device that limits the range of frequencies sent to a speaker or amplifier.
dB:
decibel, a measurement of the relative difference in power or intensity between
two acoustic signals.
Equalizer. Component that boosts or cuts sound signal frequencies to improve the
quality of the sound.
Gain control: gain is the amount of amplification (voltage, current or power) of an
audio signal expressed in dB.
Hz:
Abbreviation for Hertz, a unit of frequency equal to one cycle per second.
IVS:
Input Voltage Selector
Octave: the musical principle of dividing sound frequencies into the eight notes of the
musical scale.
Ohm: unit of electric resistance
PFS:
Precise Frequency Selector
RCA input/output port through which sound travels in and out of the system; "RCA"
refers to the type of connector, which was first manufactured by the Radio Corporation
of America.
Slope: how fast the sound gets quieter rated in dBs. The higher the dB number, the
faster the frequency drops off.
APXIDPX Amplifiers 23
Ticking noise when engine on
• High voltage ignition problem: Check for problems with the ignition system and
replace components as required.
• Cracked distributor caps
• Carbon traces on plug wires
• Loose spark plugs
Crossover. A device that limits the range of frequencies sent to a speaker or amplifier.
dB:
decibel, a measurement of the relative difference in power or intensity between
two acoustic signals.
Equalizer. Component that boosts or cuts sound signal frequencies to improve the
quality of the sound.
Gain control: gain is the amount of amplification (voltage, current or power) of an
audio signal expressed in dB.
Hz:
Abbreviation for Hertz, a unit of frequency equal to one cycle per second.
IVS:
Input Voltage Selector
Octave: the musical principle of dividing sound frequencies into the eight notes of the
musical scale.
Ohm: unit of electric resistance
PFS:
Precise Frequency Selector
RCA input/output port through which sound travels in and out of the system; "RCA"
refers to the type of connector, which was first manufactured by the Radio Corporation
of America.
Slope: how fast the sound gets quieter rated in dBs. The higher the dB number, the
faster the frequency drops off.
APXIDPX Amplifiers 23