Linear Power PA-2 AudioPath Enhancer Operation & Installation Manual Download Page 7

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INPUT GAIN ADJUSTMENT:

1. Rotate the left and right input gains located in the top cover of the

PA-2

fully

counterclockwise.

2. Set all EQ controls on the source and on the

PA-2

to the neutral position

(i.e.- no boost or cut).

3. Choose a tape or CD with a high signal level and increase the volume control
on the source to the maximum level where you still have clean output. The

volume

control on the

PA-2

should be in the position that gives you a

comfortable listening level while doing this step. After completing this step, never
touch the volume, fader, or EQ controls on the head unit again. Use only the

volume

fader

, and

controls on the

PA-2

4. Rotate the

volume

control on the

PA-2

fully counterclockwise. While playing

the same music from step 3, rotate the

L input gain

control slowly clockwise until

the clip indicator just begins to flash. Now, rotate the

L input gain

control

counterclockwise until the clip indicator just stops flashing. Repeat this process
for the

R input gain

control. The

PA-2

is now providing a 5Vrms output level to

send to the next component in your audiopath.

5. Adjusting the

EQ controls

on your

PA-2

can affect the maximum output

signal level of the preamplifier. After setting the EQ controls where you want
them, check the clip indicator to be sure it is flashing occasionally on musical
peaks. When checking the clip indicator, the position of the

volume

and

fader

controls does not matter. If the clip indicator never flashes, flashes constantly, or
stays on all of the time, leave the EQ controls where you have set them and
repeat steps 1 and 4. The clip indicator should flash occasionally on musical
peaks to obtain the optimum performance with

LINEAR POWER™

Amplifiers.

GENERAL TROUBLESHOOTING

NO SOUND:

Check all signal connections. Check that the power indicator is on.

Check for the +12Vdc on the

bat

and

rem

wires. Check the

gnd

wire connection.

Bypass the

PA-2

and check for signal output.

BLOWS FUSES:

Check all connections to be sure all power wires do not touch

ground or each other. Re-check polarity of main power wires.

NOISE PROBLEMS:

Be sure the metal sleeve on the RCA (phono) jack does

not touch the metal chassis of the vehicle, the chassis of the

PA-2

, or the

chassis of any other component in your installation. Route signal cables away
from power wires, power connectors, speaker wires, engine alternator and
vehicle firewall. Make sure all amplifier(s) or head unit(s) are properly and
securely grounded.

LINEAR POWER™ is a trademark of Linear Power, Inc.