6
WS-903
7
WS-903 Right end panel
WS-903 connection panel
13
12
9
10 11
13
Fig. 4
Fig. 5
SWITCH SETTINGS (Fig. 4)
9
Phase switch 0° to 180°
Subwoofer output phase can be set to Subwoofer Normal
0° (Button Out) or Subwoofer Reverse 180° (Button In).
10
Crossover Frequency Adjustment Knob (LP FILTER)
Use this control to adjust the crossover frequency between
50 to 150Hz.
11
Input Gain Adjustment Control
Note: If the Remote Bass Level Knob will be connected in
your system, make sure to rotate the knob fully clockwise
(set to “+”) before making the input gain adjustment.
Set the WS-903 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.
12
Power Indicator
13
Remote Gain Adjustment Input
Remote Gain Adjustment Knob
Allows the user to adjust the overall bass level of the
subwoofer.
Turning the remote bass level knob towards (+) increases
the overall subwoofer level, while turning the bass level
knob towards (-) decreases the overall subwoofer level.
(Note:
WS-903
can be used without connecting the
remote bass level knob. However, overall subwoofer level
cannot be adjusted from the listening position.)
CONNECTION CHECKLIST (Fig. 5)
Please check your head unit for the conditions listed
below: (Fig. 4)
a. The head unit does not have a remote turn-on or power
antenna 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
WS-903
must be
connected 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
WS-903
will turn on and stay on as long as the ignition
switch is on.
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
WS-903
turn-on lead. This switch will
then be used to turn on (and off) the
WS-903
. 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. Otherwise, the subwoofer will remain on and drain the
battery.
1
Blue/White
2
Power Antenna
3
Remote Turn-On Lead
4
To other components' Remote Turn-On Leads
5
SPST Switch (optional)
6
Fuse (3A)
7
As close as possible to the vehicle's ignition tap
8
Ignition Source
Indication Color
Status
Solution
Blue
Amplifier circuit is
normal
None
(LED is off)
Amplifier circuit
is abnormal. An
electrical short has
occurred, or supply
current is too high.
20A fuse may be
blown.
Turn off the power supply
and eliminate the
cause (replace the 20A if
necessary). Then
turn on the unit
and verify that the
LED has turned
on. If it remains
off, turn off the
unit and consult
your dealer.
Power supply
voltage is too high.
Use the correct
power supply voltage.
