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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
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counterclockwise.
2. Set all EQ controls on the source and on the PA-2
to the neutral position
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(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
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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 EQ controls on the PA-2
.
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4. Rotate the volume control on the PA-2
fully counterclockwise. While playing
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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
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send to the next component in your audiopath.
5. Adjusting the EQ controls on your PA-2
can affect the maximum output
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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.
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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
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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.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
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LINEAR POWER™ is a trademark of Linear Power, Inc.
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