Operation
ADJUSTING GAIN
To adjust the gain setting, turn the amplifier gains all the way down. Turn the source unit volume up until distortion is audible and then turn it down a bit until the distortion is inaudible. Next, turn the amplifier gain setting until once again distortion is audible and then back it down until the distortion is inaudible.
NOTE: For a more in depth setting procedure, contact Lightning Audio Technical Support.
ADJUSTING CROSSOVER (X-OVER)
Turn the crossover adjustment knob all the way down. With the system playing at normal listening level, turn the crossover adjustment knob up slowly until the desired crossover point is achieved.
Troubleshooting
Symptom | Diagnosis |
| Remedy |
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Amplifier does not | B+ or REM not between 10.5 and |
| Check the alternator, battery, fuse, |
turn on. | 15.5 volts or no voltage present |
| and wiring and repair as necessary |
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Amplifier Noise | Amplifier is not properly grounded. |
| Check wiring and repair as necessary |
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Voltage spike from source unit is |
| Connect | |
| entering amplifier’s input |
| terminal if pops are eliminated with |
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| no input signal to amplifier |
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Engine Noise | Noise is radiating into signal cables |
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| sources of high current |
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Specifications
FF250.1
•Maximum Power: 750 watts
•Power Rating:
250w x 1 @ 2ohms
150w x 1 @ 4ohms
•Input Sensitivity: 150mV - 4V
•High Level Input: 1.5V - 14V
•Signal to Noise Ratio: > 90dBA
•Channel Separation: 50dB
•Crossover Type: Variable 40~130Hz
•Amplifier Fuse Value: 15Amp (2)
•Chassis Size: 2”H x 11.1”W x 9.8”D
FF150.2
•Maximum Power: 450 watts
•Power Rating: 50w x 2 @ 4ohms 75w x 2 @ 2ohms
150w x 1 @ 4ohms
•Input Sensitivity: 150mV - 4V
•High Level Input: 1.5V - 14V
•Signal to Noise Ratio: > 90dBA
•Channel Separation: 50dB
•Crossover: High/Low/All Pass switch
•Crossover Type: Variable 40~400Hz
•Amplifier Fuse Value: 25Amp (1)
•Chassis Size: 2”H x 11.1”W x 6.9”D
Specifications subject to change without notice
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