27
GM-X944
Gain Control
Adjusting the gain controls A and B will
help match the output of the car stereo to
the Pioneer amplifier. Normally, set the
gain controls to the “NORMAL”
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
counter-clockwise.
•
If you only use one input plug, set the gain
controls for speaker outputs A and B to the
same position.
•
When using with an RCA equipped car
stereo (standard output of 500 mV), set to
the NORMAL position. When using with
an RCA equipped Pioneer car stereo with
max. output of 4 V or more, adjust level to
match the car stereo output level.
Power Indicator
The power indicator lights when the
power is switched on.
RCA Input Select Switch
For two-channel input, slide this switch
to the left. For four-channel input, slide
this switch to the right.
Cut Off Frequency Control
Combining LPF/HPF/BPF and
LOW/HIGH select switch settings lets
you select between cut off frequencies
from 40 to 120 Hz and 3k to 9k Hz.
(Example: LPF and HIGH)
0
-3
(dB)
(Hz)
(3
kHz)
(9
kHz)
LPF (Low-Pass Filter)/HPF (High-Pass Filter)/BPF (Band-Pass Filter) and
LOW/HIGH Select Switch
Set the LPF/HPF/BPF and LOW/HIGH select switch as follows according to the type of
speaker that is connected to the speaker output connector and the car stereo system:
LPF/HPF/BPF
Audio frequency range
Speaker
Remarks
and LOW/HIGH
to be output
Type
Select Switch
LPF
HIGH
— 3k to 9k Hz
Mid
Connect a mid range speaker.
LOW
— 40 to 120 Hz
Subwoofer
Connect a subwoofer.
HPF
HIGH
*
2
3k to 9k Hz —
Tweeter*
3
Connect a tweeter.
LOW
40 to 120 Hz —
Full range
Use if you want to cut the
very low frequency range
because it is not necessary
for the speakers you are
using.
BPF (for CH A)*
4
40 to 120 Hz —
Mid
Connect a mid range speaker.
— 3k to 9k Hz
OFF
Full range
Full range
*
2
With CH A, even if the setting is HPF-HIGH, you can only select the same cut off frequency as with
HPF-LOW (40 to 120 Hz).
*
3
If you connect the tweeter directly, you must set the CH B to HPF-HIGH.
*
4
Be sure to set the LOW/HIGH select switch to HIGH.
Frequency
Level
Summary of Contents for GM-X944
Page 4: ...4 GM X944 2 2 EXTERIOR ...
Page 13: ...13 GM X944 5 6 7 8 A B C D 5 6 7 8 A BFC SIDE A FAN MOTOR ...
Page 14: ...14 GM X944 A 1 2 3 4 B C D 1 2 3 4 A A AMP UNIT ...
Page 15: ...15 GM X944 5 6 7 8 A B C D 5 6 7 8 A SIDE B ...
Page 26: ...26 GM X944 8 OPERATIONS AND SPECIFICATIONS 8 1 OPERATIONS ...
