Lightning-audio FF150.2 User Manual download pdf (Page 8)

Troubleshooting

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.

Symptom Diagnosis Remedy

Amplifier does not

turn on.

Amplifier Noise

(Turn-On Pop)

Engine Noise

B+ or REM not between 10.5 and

15.5 volts or no voltage present

Amplifier is not properly grounded.

Voltage spike from source unit is

entering amplifier’s input

Noise is radiating into signal cables

Check the alternator, battery, fuse,

and wiring and repair as necessary

Check wiring and repair as necessary

Connect turn-on module to REM

terminal if pops are eliminated with

no input signal to amplifier

Re-route signal cables away from

sources of high current

Specifications

• 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

• 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

FF250.1

Specifications subject to change

without notice

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Lightning-audio FF150.2 User Manual Page 8

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