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, tur n
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)
Placing the switch in the HPF position sets the amplifier to the High Pass mode, enabling
frequencies above the cut-off point to pass, adjustable between 40-400Hz.
Placing the switch in the FULL position sets the amplifier to the All Pass mode, preventing any
crossover adjustment, allowing all frequencies to pass..
Placing the switch in the LPF position sets the amplifier to the Low Pass mode, enabling
frequencies below the cut-off point to pass, adjustable between 40-400Hz.
Tur n 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: 900 watts
• Power Rating: 100w x 2 @ 4ohms
150w x 2 @ 2ohms
300w 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: 20Amp (2)
• Chassis Size: 2”H x 11.1”W x 10.4”D
LA1.300.2
• 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: 20Amp (1)
• Chassis Size: 2”H x 8.2”W x 10.4”D
LA1.150.2