Audiovox Prestige PAB-1500D - Manual (Page 11)

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Once the correct setting is found, this control should not
require any further adjustment.
3
Sub-sonic Filter Selector Switch
This switch enables On/Off selection of the sub-sonic
frequency filter, thereby allowing the operator to initially
set the amplifier high pass frequency for a sub-woofer
between 20Hz and 50Hz.
In the "OFF" position of the switch, the response is flat and
unaffected so the entire woofer audio frequency range
(low-pass) is reproduced by the amplifier. Use this setting
if the amplifier is being used to power a full range woofer
speaker.
In the "ON" position, only the frequencies above the
frequency set by the SUB-SONIC FILTER FREQUENCY
(Hz) Control will be amplified and fed to the speakers. Use
this setting to eliminate possible destructive sub-sonic
frequencies (<20Hz). Setting should be at lowest
frequency reproduced by your specific sub-woofer.
5
4
Remote Subwoofer Level Control Input
This connector permits the amplifier to be used with the
PAB-RC Remote Control Unit. This control unit is
normally mounted in the passenger compartment, and
allows for remote level adjustment of the Bass Boost
audio output from the power amplifier.
5
Fuse
The circuitry of the amplifier is protected from damage
by automotive-type fast-blow fuses. 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 the amplifier.
If fuses blow consistently, carefully check all electrical
connections to the unit.
6
Bass Boost Switch
This switch is used to accentuate the bass frequencies by
adding +12 dB of boost to the signal (at 45Hz), or +18
dB of boost (@ 60Hz). Use the +18 dB @ 60Hz for
maximum SPL (Sound Pressure Level).