Pioneer GM-X404 Manual del usuario - Página 6
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Setting of this Unit
(Fig. 1)
[1] Power Indicator
The power indicator lights when the
power is switched on.
[2] RCA Input Select Switch
For two-channel input, slide this switch
to the left. For four-channel input, slide
this switch to the right.
[3] BFC (Beat Frequency Control) Switch
If you hear a beat while listening to an
AM broadcast with your car stereo,
change the BFC switch using a small
screwdriver.
[4] Input Level Adjustment
Adjusting the input level controls A and
B will help match the output of the car
stereo to the Pioneer amplifier. Input
level control A is used to adjust the
volume of speaker output A; Input level
control B is used to adjust the volume of
speaker ouput B. Normally, set the
switch to the "500 mV" position. If the
output is low even when the volume of
the car stereo is turned up, turn these
controls clockwise. If there is distortion
when the volume of the car stereo is
turned up, turn these controls clockwise.
• If you only use one input pin plug, set
the input level controls for speaker
outputs A and B to the same position.
6
• Set the input level control to 500 mV
when this amplifier is connected to a
Pioneer car stereo with RCA output
jacks. If the sound is too low or dis-
torts, adjust the input level control.
[5] Speaker Out A: LPF (Low-Pass Filter)/
HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows
according to the type of the speaker that
is connected to the speaker output
connector and the car stereo system:
LPF/HPF
Audio frequency
Select
range tobe output
Switch
LPF
Very-low-frequency
(left)
range
Very-low-frequency
OFF
range to high-
(center)
frequency range
Low-frequency
HPF
range to high-
(right)
frequency range
*
* Set the LPF/HPF select switch to the HPF
(right) position if you want to cut the very-
low-frequency range because it is not
necessary for the speaker you use.
[6] Speaker Out A: Bass Boost Level
Control
Bass boost level control can boost the
level around the frequency selected by
the bass boost frequency control to 0 to
12 dB.
[7] Speaker Out A: Bass Boost Frequency
Control
You can select a bass boost frequency
from 40 to 120 Hz with the bass boost
control.
• [6] [7] can be adjusted only when the
LPF/HPF select switch is set to a position
other than HPF .
[8] Speaker Out B: HPF (High-Pass Filter)
Select Switch
Set the HPF select switch as follows
according to the car stereo system and
the type of speaker connected to the
Speaker Type
speaker output:
HPF
Sub-woofer
Select
Switch
Other than
sub-woofer
OFF
(left)
Other than
HPF
sub-woofer
(right)
*
* Set the LPF/HPF select switch to the HPF
(right) position if you want to cut the very-
low-frequency range because it is not
necessary for the speaker you use.
Audio frequency
Speaker Type
range to be output
Very-low-frequency
range to high-
Sub-woofer
frequency range
Low-frequency
Other than
range to high-
sub-woofer
frequency range