Audiovox AXT-500 - Manual (Page 15)

LPF Crossover Frequency Control
This Control selects the crossover frequency when the
Sub woofer Crossover 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.
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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, these controls should
not require any further adjustment.
Crossover Selector
This switch allows selection of the frequency filters that
permit 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
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.
HPF(High-Pass Filter): Only mid-high tone
(50Hz-250 Hz) Speaker.
High Level Input Connection
If the car stereo not does not provide low-level outputs,
the amplifier may be connected via the speaker (high-
level) outputs from the stereo. Wire the speaker leads
from the car stereo to the 5-pin adaptor harness as
shown in the diagram (shielded cable is not required for
this application) and plug the connector into mating High-
Level Input socket on the amplifier. Carefully splice and
insulate all wire connections.
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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 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.
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