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128-5721128-5721
128-5721128-5721
128-5721
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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.
Sub-Woofer Filter Selector Sub-Woofer Filter Selector
Sub-Woofer Filter Selector Sub-Woofer Filter Selector
Sub-Woofer Filter Selector
This switch allows selection of the low-pass frequency
filter that permits the amplifier to be used to reproduce
the entire audio range or just the bass range.
In the "FULL" 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.
In the "LPF" (Low-Pass Filter) setting, only the bass
frequencies
belowbelow
belowbelow
below
the frequency set by the Crossover
Frequency Control
will be amplified and fed to the
speakers. Use this setting if the amplifier is being used
to power a sub-woofer speaker system.
LPF Crossover Frequency Control LPF Crossover Frequency Control
LPF Crossover Frequency Control LPF Crossover Frequency Control
LPF Crossover Frequency Control
This Control selects the crossover frequency when the
Filter Selector
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.
Cooling FanCooling Fan
Cooling FanCooling Fan
Cooling Fan
This unit incorporates a fan to provide continuous air flow
through the unit to keep the heat-sink and components, safely
within their operating temperature range. The fan is
automatically activated whenever +12 volts is supplied to
the Remote Turn-On terminal.
FuseFuse
FuseFuse
Fuse
The circuitry of the amplifier is protected from damage by
an automotive-type fast-blow fuse. If fuse replacement is
necessary, use only fuses of the same ampere rating as
originally supplied with the unit. The use of fuses with
incorrect ratings may cause serious damage to the
amplifier. If fuses blow consistently, carefully check all
electrical connections to the unit.