Precision Power A100 - Manual (Page 10)

Adjusting Crossover Input Gains:
1. Adjust all crossover gain controls to 0 dB, 1/2 of maximum sensitivity.
2. Adjust all amplifier gains to 1/2 of maximum sensitivity.
3. Turn the volume knob on the equalizer to a maximum of 3 o'clock.
4. Increase the gain of the crossover until the onset of audible distortion. Then
decrease the gain prior to the immediate point of audible distortion. This setting
will minimize system background noise and prevents overloading of the
crossover.
5. Repeat step 4 for any remaining crossovers in the system.
6. Adjust the input gains next.
NOTE: In many multi-crossover / accessory systems, the gain of some crossover and
accessories may need to be further decreased to achieve proportional balance.
Adjusting the Amplifier's input Gain:
Adjust the amplifier's input gain to 1/2 maximum sensitivity. Turn the volume knob on the
equalizer to a maximum of 3 o'clock. Increase the gain (clockwise) until the onset of audible
distortion. Then decrease the gain counterclockwise prior to the immediate point of audible
distortion. This setting will minimize system background noise and prevents overloading of the
amplifier. Repeat step 3 for any remaining amplifiers in the system.
NOTE: Depending on the sensitivity of the systems preamp(s), the gain of the
amplifier(s) may not need adjustments. Also, in many multi-amplifier systems, the gain of
some amplifiers may need to be further decreased to achieve proportional balance.
TROUBLESHOOTING
If for some reason your system fails to operate properly, please refer to this guide. If you are
unable to resolve the problem, consult your Authorized PPI Dealer or call 1-800-62-POWER.
NO SOUND
Is the power LED illuminated?
Check fuses in power wire.
Be sure turn-on lead is connected.
NO SOUND IN ONE CHANNEL
AMP TURNING OFF
Check speaker leads and inspect for a short to ground or
an open connection.
Check pre-amp leads. Reverse left and right leads to see
if the problem is before the amplifier.
Check Mono Bridge and Bi-Amp crossover switches on
other units prior to the amp.
If the problem is in the amp, have your Dealer inspect
the unit.
Is the amp able to cool properly?
Check speakers for shorts or damage.
Make sure power and ground are secure.
Have PPI Dealer inspect amp.
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