JBL MS-A1004 User Manual - page 10
10
To Set the Input Level:
1. Move the switch for the Input Signal Selector to the Hi position (or Hi2, if you are connecting to a factory
system with open-circuit protection).
2. Set the bass, treble, balance and fader controls on your head unit to the center (or flat) positions. Set
loudness to off. Defeat any sound-enhancement (such as DSP, surround sound or EQ) settings.
3. Insert the setup CD into your head unit and verify that the CD is playing.
4. Enter Setup mode by pressing CW and CCW buttons simultaneously for more than three seconds until
the Input Level adjustment icon
lights. The amplifier’s output will be muted (the output-level indi-
cator will show “
” in the display).
5. Turn the head unit’s volume control all the way up (to maximum output).
6. Using a small screwdriver on the level-adjustment dial next to the Input Signal Selector switch,
adjust the Input-Level Control up or down, while watching the icons on the amplifier’s display panel.
If the green “up” arrow icon is lit, turn the control clockwise until the icon is lit.
If the red “down” arrow icon is lit, turn the control counterclockwise until the icon
is lit.
NOTE: If turning the control fully clockwise doesn’t cause the icon to light, move the switch for
the Input Signal Selector to the Lo position and try again.
Once the icon is lit, stop adjusting and repeat the procedure to set the input level on the other channels.
When both check marks are lit, the input levels for each channel pair are set properly.
To Enable or Disable Signal-Sensing Turn-On:
7. While in Setup mode, enable/disable signal-sensing turn-on
by turning the rotary controller clockwise or counterclockwise
to select SEn On or SEn OFF in the display. If you have
connected a remote turn-on lead, set to SEn OFF.
8. Turn the volume control on your head unit down and remove the
setup CD. If you miss or circumvent this step, the audio system
will reproduce a loud test signal that could damage speakers when exiting the Setup mode.
9. Press and release the CW and CCW buttons simultaneously to exit Setup mode.
10. Do not adjust the Input-Level Controls further. Use the Output Gain Control to balance the channel levels
and to “tune” the system.
seTTiNG THe FiLTers (CrOssOVers)
There are 98 selectable frequencies for the low-pass and high-pass
filter settings. The selectable frequencies are detailed in the table to the
right.
Getting to the Crossover settings
Press both CCW and CW buttons at the same time for less than three
seconds and release, to activate the controls. Use the CCW and CW
buttons to navigate to the preferred crossover-adjustment parameter.
How to set a High-Pass Filter
Navigate to the high-pass filter frequency parameter
and, using the
rotary encoder, select the desired cutoff frequency. Then navigate to
the high-pass filter slope parameter
and, using the rotary encoder,
select the desired filter slope.
High-Pass example
Use the CW and CCW buttons to navigate to the Low-Pass frequency
parameter and set to OFF.
How to set a Low-Pass Filter
Navigate to the Low-Pass Filter frequency parameter
and, using the rotary encoder, select the desired
cutoff frequency. Then navigate to the Low-Pass Filter slope parameter
and, using the rotary encoder,
select the desired filter slope.
Low-Pass example
Use the CW and CCW buttons to navigate to the High-Pass frequency parameter and set to OFF.
Mode
Function
SEn On
Signal Sensing is ON
SEn OFF
Signal Sensing is OFF
Available Crossover Frequency settings
20.0Hz
95.0Hz
260Hz
1.40kHz
4.80kHz
22.5Hz
100Hz
270Hz
1.50kHz
5.00kHz
25.0Hz
105Hz
280Hz
1.60kHz
5.50kHz
27.5Hz
110Hz
290Hz
1.70kHz
6.00kHz
30.0Hz
115Hz
300Hz
1.80kHz
6.50kHz
32.5Hz
120Hz
350Hz
1.90kHz
7.00kHz
35.0Hz
125Hz
400Hz
2.00kHz
7.50kHz
37.5Hz
130Hz
450Hz
2.20kHz
8.00kHz
40.0Hz
140Hz
500Hz
2.40kHz
8.50kHz
42.5Hz
150Hz
550Hz
2.60kHz
9.00kHz
45.0Hz
160Hz
600Hz
2.80kHz
9.50kHz
50.0Hz
170Hz
650Hz
3.00kHz
10.0kHz
55.0Hz
180Hz
700Hz
3.20kHz
12.0kHz
60.0Hz
190Hz
750Hz
3.40kHz
14.0kHz
65.0Hz
200Hz
800Hz
3.60kHz
16.0kHz
70.0Hz
210Hz
900 Hz
3.80kHz
18.0kHz
75.0Hz
220Hz
1.0kHz
4.00kHz
20.0kHz
80.0Hz
230Hz
1.10kHz
4.20kHz
OFF
85.0Hz
240Hz
1.20kHz
4.40kHz
90.0Hz
250Hz
1.30kHz
4.60kHz