Pioneer PRS-X220, Руководство по обслуживанию

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PRS-X720,X320,X220
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8. OPERATIONS AND SPECIFICATIONS
8.1 OPERATIONS
Setting the Unit
Gain Control
If the sound level is too low
, even when
the volume of the car stereo used along with this power amplifier is turned up, turn gain control on the back of the power amplifier clockwise. If the sound distorts when the volume is turned up, turn the gain control counter
-clockwise.
•
W
hen 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 ouput level.
Power Indicator
The power indicator lights when the power is switched on.
Bass Boost Level Control
Bass boost level control can boost the level around the frequency selected by the bass boost frequency control from 0
to 18 dB.
Cut Off Frequency Control
If the LPF/HPF select switch is set to LPF (or HPF), you can select a cut of
f
frequency from 50 to 120 Hz.
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows according to the type of speak- er that is connected to the speaker output connector and the car stereo system:
LPF/HPF
Select
Audio fr
equency range
Speaker
Remarks
Switch
to be output
T
ype
LPF
(left)
*
— 50 to 120 Hz
Sub-woofer
Connect a sub-woofer
.
OFF
(center)
Full range
Full range
HPF (right)
* 50 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.
*
See the “Cut Of
f Frequency Control” section.
Bass Boost Frequency Control (PRS-X720 and PRS-X320)
Y
ou can select a bass boost frequency
from 40 to 120 Hz with the bass boost control. •
B
ass Boost Level Control and Bass Boost
Frequency Control can be adjusted only when the LPF/HPF select switch is set to a position other than HPF
.
Subsonic Select Switch (PRS-X720 and PRS-X320)
The subsonic filter cuts inaudible fre- quencies below 15 Hz to eliminate unwanted vibrations and minimize power loss.