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Linear Power 4503IQ Owner's Manual And Installation Manual page 3

4-channel multi-configuration amplifiers

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MOUNTING
1.The amplifier works best if it is kept as cool as possible. Mount in a position
that allows air to flow freely through the fins. Be sure there is ample space above
the amplifier to avoid trapping heated air rising from the amplifier. The amplifier
should not be mounted upside down. Avoid mounting any amplifier in the dash or
on the firewall to avoid noises being radiated directly onto the case.
2.The case of your amplifier is designed to act as a noise shield. To maintain this
protection, be sure the metal case of the amp does not touch the metal of the
car. Do not remove or damage the rubber grommets, which provide electrical
insulation and vibration isolation.
OPERATION / ADJUSTMENT
For any system to operate at minimum distortion with minimum noise and still
reach full power output, the equipment should be aligned to operate at the same
point on the distortion curve at the same time. In a basic system, using a single
amplifier, set the amp sensitivity adjustment to minimum, turn the deck up until it
just starts to distort, then back down slightly. This is the point where the output of
the deck is cleanest. Now, bring the sensitivity control of the amp up until it just
starts to distort, and back it down slightly. This will allow the amp and the deck to
reach maximum usable output at the same time.
GENERAL TROUBLESHOOTING
NO SOUND
Check all connections. Check main power fuses. Check accessory fuse. With a
trouble light or meter, be sure +12v is present at the amplifier on the power wires
and the red/white turn-on wire. Check for a good ground connection. Check by
substitution, or other method, for proper operation of music source.
BLOWS FUSES
check all connections to be sure power wires and speaker wires do not touch
each other or ground. Re-check polarity of main power wires. Check impedance
of speaker loads and setting of the internal power taps to insure proper match.
SHUTS OFF
As this amplifier is equipped with thermal and short circuit shut-down electronics,
in the event of high ambient temperature or improper speaker impedances, the
amp will turn itself off. To avoid damage to speakers, turn down the volume while
waiting for the amp to turn itself back on. If this occurs repeatedly, use a fan to
cool the amplifier and check for proper speaker loads and connections.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
3
LINEAR POWER™ is a trademark of Linear Power, Inc.

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