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overload condition, the source of the overload must
be found and corrected to resume operation of the
amplifier. Most overload conditions are caused by
mis-wiring or operation into incorrect speaker loads.
Re-check all wiring and connections if this situation
occurs and correct as necessary.
3
Level (Gain) Control
The amplifier is capable of operating from sources
supplying a wide range of input levels. The Level
control should initially be set to the mid-rotation position.
If it is found that there is not enough output even when
the volume control on the car stereo is at its maximum
setting, adjust the Level control to increase the output
from the system. If, however, there is still output from
the amplifier when the car stereo volume control is at its
minimum setting, or the output level increases too fast
with a small rotation of the volume control, adjust the
Level control to decrease the output from the system.
Once the correct setting is found, this control should not
require any further adjustment.
4
Crossover Selector
This switch allows selection of the frequency filters that
permit the amplifier to be used to reproduce the entire
audio range, just the bass range or just the midrange/treble
range as follows.
"FULL" Position:
In this position of the switch, the
response is flat and unaffected so the entire
audio frequency range is reproduced by the
amplifier. Use this setting if the amplifier is
being used to power a full range speaker system.
"LPF" Position:
In the "LPF" (Low-Pass Filter) setting,
only the bass frequencies
below
thefrequencyset
by the LPF Crossover Frequency Control
5
will
be amplified and fed to the speakers. Use this
setting if the amplifier is being used to power a
sub-woofer speaker system.
"HPF" Position:
In the "HPF" (High-Pass Filter) setting,
only the midrange/treble frequencies
above
the
frequency set by the HPF Crossover Frequency
Control
6
will be amplified and fed to the speakers.
Use this setting if the amplifier is being used to
power a midrange/tweeter speaker system.
5
LPF Crossover Frequency Control
This Control selects the crossover frequency when the
Crossover Selector
4
is in the "LPF" setting. Adjust it to
the appropriate position for the characteristics and
crossover frequency requirements of the speaker system
with which the amplifier is being used.
6
HPF Crossover Frequency Control
This Control selects the crossover frequency when the
