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and power ground are common. This point should be established by
the source unit. When multiple source units are used, each will
establish its own common ground point, with the result being the
dreaded "ground loop." (Ground loops are the primary cause of
engine noise in a system.) By utilizing independent input grounds, the
EPX
preamplifier avoids ground loops.
2
COMMON
GROUNDS
The preamp also has individual solid-state input sensitivity controls
on the input circuitry. This, in conjunction with our unique on-line
level setting procedure, allows the installer to perfectly integrate the
EPX
with the rest of the sound system. This on-line level setting
2
process is an industry first. The EPX
through the level setting procedure via the RDAT (Remote Data
Access Terminal). This process is more than just a series of instruc-
tions. The EPX
2
the best possible signal-to-noise ratio, while still maintaining ad-
equate signal headroom. Finally, the EPX
Volts RMS of output signal. This results in reduced system noise (hiss)
and maximum dynamic range.
Equalizer
Equalizers (EQs) are signal processors that are used to correct or
compensate for the acoustical deficiencies inherent in most auto
sound installations. EQs are also commonly used to "tailor" the
sound of a system to the listener's own personal listening preference.
The EPX
has the ability to integrate a 14-band or 28-band equalizer
2
through the use of a plug-in module.
actually adjusts itself during this maneuver to ensure
(optional)
– 5 –
INDEPENDENT
GROUNDS
system actually steps the installer
2
is capable of producing 10
2
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