5
5. Connect the outputs from the signal
source to the appropriate inputs of
the amplifier according to the Wiring
Diagram (page 13) with either high
quality low-level signal cables with
RCA plugs, with the supplied
Speaker-level input connector, or
both.
6. Connect the speakers to the ampli-
fier according to the wiring diagram
on page 13.
7. Turn the input sensitivity adjustment
to the
1
/
4
position.
8. Set the input level switch to “line”
if you are using the line-level
(preamp) inputs.
9. Set the crossover switch as desired.
10. Set the input mode switch to
stereo, left + right or right input
only operation.
11. Reconnect the negative battery
cable.
12. Turn on the signal source at a low
volume level and check for the
correct output from each speaker.
13. Adjust the amplifier gain control,
using the procedure described in
the Gain Adjustment section on
page 20.
14. Read the rest of the manual to get
maximum use and enjoyment from
your amplifier.
Quick Start
Recommended for experienced
professional installers only!
1. Disconnect the negative cable from
the battery.
Note: If the vehicle’s
radio features a code type security
system, make certain you know the
code before disconnecting the
battery!
2. Mount the amplifier to the desired
location using four screws.
3. Run a minimum AWG #10 power
cable complete with a 20 amp fuse
(not included) directly from the posi-
tive +12V battery terminal to the
desired amplifier location. Keep
the fuse to within 5" of the battery
terminal, and before the wire runs
through any metal partition.
Note: All wiring connections should be
made either by soldering with heat-
shrink tubing insulation or with high
quality crimp type insulated connectors
installed with a good crimping tool.
Soldering crimp connections is recom-
mended to further enhance connection
reliability. Never use wire-nuts, insula-
tion-displacement connectors (i.e.
ScotchLok type), or “twist and tape”
connections. Do not use electrical tape;
it will loosen with age and extreme
temperatures. Never leave bare wire
exposed.
4. Connect power wiring as shown in
the
Wiring Diagram on page 13,
using the supplied power harness.
JBL 1394 Manual 7/17/98 11:49 AM Page 5
