Owner`s manual
Fig. 8
SWITCH SETTINGS (Fig. 9)
c) Set to "30 Hz" when connected to speak-
ers (not subwoofers) thatcannot 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
-'
Il-
OFF
15Hz
30Hz
SUBSONIC
FILTER
[JD
-'
Il-
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.
[[]
-'
Il-
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 inputgain 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