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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

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

the amount of amplification (voltage, current or power) of an

audio signal expressed

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

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

dBs. The higher the dB number, the

faster the frequency drops off.

APXIDPX Amplifiers