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Fig. 8
SWITCH SETTINGS (Fig. 9)
c) Set to "30 Hz" when connected to speak-
ers (not subwoofers) that cannot reproduce
frequencies below 30 Hz. In some cases,
distortion can be heard and eliminated by
turning on the Subsonic Filter.
b) Set to "15 Hz" when connected to
subwoofers such as 10 inch (25 em) bass
speakers. This allows the amp and
subwoofers to reproduce frequencies
above 15 Hz. Those frequencies below
15 Hz, which are inaudibie, are filtered and
no longer heating up the amplifier.
SUBSONIC
FILTER
rn
- ' I l -
OFF 15Hz 30Hz
SUBSONIC
FILTER
[JD
- ' I l -
OFF
15Hz
30Hz
~
Crossover Frequency Adjustment Knob (LP FILTER)
Permits adjustment of the crossover frequency, by rotating the
knob to select any frequency between 50 to 200 Hz as the cross-
over point.
4D
Subsonic Filter Mode Selector Switch
SUBSONIC
a) Set this switch to "OFF" to eliminate any
FILTER
filtering of the low frequencies.
[ [ ]
- ' I l -
OFF
15Hz 30Hz
CDGl
Power Indicator
Lights up when power is on.
Is off when power is off.
If this is objectionable, a SPST (Single Pole. Single Throw) switch,
in addition to the 3A fuse mentioned above, may be installed in-
line on the PDX-1.600M turn-on lead. This switch will then be
used to turn on (and off) the PDX-1.600M. Therefore, the switch
should be mounted so that is accessible by the driver. Make sure
the switch is turned off when the vehicle is not running. Other-
wise, the amplitier will remain on and drain the battery.
cD
Remote Turn-On Lead
®
Power Antenna
@
Remote Turn-On Lead
@
To other Alpine components' Remote Turn-On Leads
®
SPST Switch (optional)
®
Fuse(3A)
(1)
As close as possible to the vehicle's ignition tap
®
Ignition Source
1.0V-B.OV
0.1V-1.0V
Adjustment Range
1.0V-B.OV
0.1V-1.0V
Input Gain Selector Switch setting
Please check your head unit for the conditions listed below:
(Fig. 10)
a. The head unit does not have a remote turn-on or power an-
tenna lead.
b. The head unit's power antenna lead is activated only when
the radio is on (turns off in the tape or CD Mode).
c.
The head unit's power antenna lead is logic level output (+)
5V, negative trigger (grounding type), or cannot sustain (+)
12V when connected to other equipment in addition to the
vehicle's power antenna.
If
any of the above conditions exist,
the remote turn-on lead of your PDX-1.600M must be con-
nected to a switched power source (ignition) in the vehicle. Be
sure to use a 3A fuse as close as possible to this ignition tap.
Using this connection method, the PDX-1.600M will turn on
and stay on as long as the ignition switch is on.
When making adjustments B-11 below, remove the hexagon screw
(indicated
by
*
in the illustration) using the hexagon wrench (small,
supplied), and then open the control cover.
o
Input Gain Adjustment Control
Set the PDX-1.600M input gain to the minimum position.
Using a dynamic CD as a source, increase the head unit volume
until the output distorts.
Then, reduce the volume 1 step (or until the output is no longer
distorted).Now, increase the amplifier gain until the sound from
the speakers becomes distorted. Reduce the gain slightly so the
sound is no longer distorted to achieve the optimum gain setting.
o
Input Gain Selector Switch
Set this switch according to the head unit's output level.
Set to the "0.1 V-1.0V" position when the output level of the head
unit is 0.1 V-1.0V. Set to the "1.0V-B.OV" position when the output
level of the head unit is 1.0V-B.OY.
CONNECTION CHECK LIST (Fig.10)
Input gain adjustment range varies depending on the setting of
the input gain selector switch (see
"®
Input Gain Selector Switch")
CD
Status Indicator
Lights up when power is on. You can confirm the amplifier status by how the indicator
is lit, as shown in the table below. Turn off when power is off.
Indicator lit status
Status
Solution
Blue
Red
Lit
Amplifier circuit is normal.
Amplifier circuit is abnormal. An
Turn off the power supply and eliminate the cause. Then turn on the
--
Lit
electrical short has occurred,
unit and verify that the indicator color has changed to blue.
If it
or supply current is too high.
remains red, turn off the unit and consult your dealer.
--
Lit
Power supply voltage is too high. Use the correct power supply voltage. The indicator color changes to blue.
--
Lit
Ambient temperature is too high.
Decrease the vehicle's interior temperature to a normal
level. The indicator color changes to blue.
--
Blinking
Output protection (due to high
Decrease the vehicle's interior temperature to a normal level. Output
temperature) is activated.
protection is released and the indicator color changes to blue.
~~
Fig. 9
Fig. 10
I
Oe-----+-:-- __ ®_6_---J~
@
-.J
®
,-
I
PDX-1.600M
~1111~--,~
!
G):.~
. .
~·,i·~
1
--==
~
---
:'-~_:~ : ~ : ~ : : : h - : · ~ : ~ : ~ : ' : : I ~ : ' : ::::::::::::::::::::::::::::::::I::::=~1:1j
Panneau des commutateursl
*
Panel de Interruptores
SWITCH SETTINGS/REGLAGES DE COMMUTATEURlAJUSTES DEL INTERRUPTOR
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