JBL Loud + Clear LC-A504 User Manual page 3

A m
Wiring the Input-Signal Connections
Connect a pair of signal cables with RCA-type ends between the connectors
on the amplifier and the RCA-type signal connectors on the source unit. If
your radio has only speaker-level outputs, you must purchase a speaker-
level-to-line-level adapter, commonly sold as an accessory.
System Setup and Adjustment
Refer to figures 1–4 for location of adjustment switches and controls.
Electronic Crossover (for LC-A752 and LC-A504)
The electronic crossover can be selected as a 12dB/oct high-pass filter
(HPF), 12dB/oct low-pass filter (LPF) or it can be defeated (FLAT). The
crossover frequency can be set at any frequency between 32Hz and 320Hz.
Setting Input Level
Initially, turn the input-sensitivity LEVEL control to its maximum
(counterclockwise) position. Turn on the source unit and increase the
volume control until it is approximately three-quarters of maximum-
output level. Slowly increase the input LEVEL control (clockwise) while
listening to the quality of the reproduced sound. When you hear distor-
tion on the music peaks, turn the LEVEL control back slightly. This is
the maximum undistorted output level of your system. Turning the
LEVEL control up farther WILL NOT INCREASE THE OUTPUT
POWER OF YOUR AMP! It will only decrease the amount of volume
control rotation before the amp is at full output power. It will also
increase the amount of extraneous noise present in your system.
FRONT PANEL
LINE INPUT INPUT
LEVEL
RIGHT
4V 250mV
LEFT
REAR PANEL
OUTPUT
LEFT RIGHT
BRIDGED
Figure 1
FRONT PANEL
INPUT
LINE INPUT CROSS
LEVEL
OVER
RIGHT
LPF HPF
FLAT
4V 250mV
LEFT
REAR PANEL
OUTPUT
LEFT
RIGHT
BRIDGED
Figure 2
p l
Model No. LC-A502
POWER
FUSE
POWER
20 AMP
BATT(+) REM GND (-)
Model No. LC-A752
POWER
32Hz 320Hz
FREQUENCY
FUSE
POWER
25 AMP
BATT(+) REM GND (-)
i f i
LINE INPUT
RIGHT
LEFT
OUTPUT
LEFT
BRIDGED
Figure 3
LINE INPUT
RIGHT
LEFT
OUTPUT
FUSE
LEFT
20 AMP
BRIDGED
Figure 4
e r
Model No. LC-A304
FRONT PANEL
FRONT REAR
LINE INPUT
POWER
INPUT INPUT
LEVEL LEVEL
RIGHT
4V 250mV 4V 250mV
LEFT
REAR PANEL
REAR FRONT
OUTPUT POWER
RIGHT LEFT RIGHT BATT(+) REM GND (-)
BRIDGED
Model No. LC-A504
FRONT PANEL
FRONT REAR
POWER
CROSS CROSS LINE INPUT
OVER OVER
INPUT INPUT
LEVEL LEVEL
RIGHT
LPF LPF
HPF HPF
FLAT FLAT
4V 250mV 4V 250mV
32Hz 320Hz 32Hz 320Hz
LEFT
FREQUENCY FREQUENCY
REAR PANEL
REAR FRONT
OUTPUT POWER
RIGHT LEFT BATT(+) GND (-)
RIGHT REM
BRIDGED
s
FUSE
20 AMP
FUSE
20 AMP