JBL MARINE
СНАРТЕR 3: OPERAТIONS
Setting the input levels:
То match your amplifier's input sensitivity (gain) to your source unit's output level, we recommend the following procedure:
А. Turn both input level controls counterclockwise to MIN (minimum).
В. Play а dynamic music track through your source unit. Turn the source unit's volume control to the 3/4 position.
С. Turn the front input level control dial clockwise towards МАХ until you hear distortion in the music (it's по longer clear).
О. Slowly turn the front level input control dial counterclockwise until the music sounds clear again.
Е. Your front input level is now correctly set. Repeat this process with the rear channels.
GAIN
✓
MIN МАХ
Setting the crossover
Properly setting crossover filter selectors optimizes frequency distribution for efficient speaker operation and best sound.
Step 1: Use the slider controls to select low-pass (LP), FULL, or high-pass (НР).
• LP: Low pass. Choose this setting if you are connecting а subwoofer(s) or want to provide а low-pass filter for separate mid-bass speakers.
• FULL: Full range. Choose this setting if you are connecting full-range speakers and are not using а subwoofer in your system.
• НР: High pass. Choose this setting to prevent low bass from reaching midrange or full-range speakers when you are using а subwoofer in
your system.
Step 2: Use crossover-filter frequency controls to adjust crossover point settings for coaxial speakers and subwoofers to suit listener preference.
Turn the dials to the left to lower the crossover point and to the right to raise the crossover point. Exact crossover settings for coaxial speakers
and subwoofers finally depend on your listening preferences. NОТЕ: crossover point does not apply in FULL mode.
Adjusting the subwoofer:
Select INT if you're connecting а subwoofer to the МА4505 amplifier, but your source unit does not feature а subwoofer output (this will send а
summed audio signal to the subwoofer). lf your source unit does feature а subwoofer output, select ЕХТ to connect to that output.
SUBINPUT
l
111111111 11
_J
L_
INT
ЕХТ
