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For standard low-level (preamp-
IVlUbl
level
aPPr(
chass
3
o'c
The
l
level) inputs:
""--*
head units provide a nominal low-
(preamp level) output signal of
)ximately 500mV. On your amplifier
;is is a dot indicator located at the
lock position on the INPUT control.
...-
lNPUT control should be set to this
position for normal preamp-type head units.
If the system does not distort when tested,
and plays loudly enough, leave the INPUT
control at this setting. However, if opera-
tion is not satisfactory, or your head unit has
a non-standard output signal. use the
adjustment method described in the
following section.
For nonstandard low-level
(preamp-level) and high-level
(speaker-level) inputs:
Turn the INPUT SENSITIVITY control all
the way down to MIN (full counterclock-
wise). Select well-recorded, full-range
music that you are familiar with to use as
source material. Proceed with testing the
system by momentarily advancing and
reducing the head unit volume control in
successively higher levels as follows:
If no distortion is present and the system
plays loudly enough, leave the INPUT
control at the MIN position.
If no distortion is present and the system
does not play loudly enough, turn up the
INPUT control approximately
118
of its
rotation clockwise and retest the system
for undistorted (unclipped) output.
Proceed with successively higher INPUT
control settings until the system is loud
enough and no distortion is present. If
you hear any distortion (clipping) at a
new setting, reposition the INPUT control
to its previous test setting and leave it
there.
Note:
If the head unit is a preamp-level-
type, you may want to advance the
INPUT control in larger steps until it
reaches the
12
o'clock position to reduce
the number of test steps.
Some high-level (speaker-level) connec-
tions may result in a limitation of the usable
volume control range. In this case, you can
obtain additional range in your volume
control
by
installing a line-level adaptor,
commonly available from your autosound
dealer.
21


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