9
Operation/Troubleshooting
Troubleshooting
NOTE: If you are having problems after installation follow the
Troubleshooting procedures below.
Step 1. Check Amplifier for proper connections. Verify that
POWER light is on. If POWER light is on skip to Step 3, if
not continue.
1. Check in-line fuse on battery positive cable. Replace if necessary.
2. Check fuse(s) on amplifier. Replace if necessary. Do not exceed
10A.
3. Verify that Ground connection is connected to clean metal on the
vehicle’s chassis. Repair/replace if necessary.
4. Verify there is 9 to 14.4 Volts present at the positive battery and
remote turn-on cable. Verify quality connections for both cables
at amplifier, stereo, and battery/fuseholder. Repair/replace if
necessary.
Step 2. Protect light is on.
1. If the Protect light is on, this is a sign of a possible short in the
speaker connections. Check for proper speaker connections
and use a volt/ohm meter to check for possible shorts in the
speaker wiring. Too low of a speaker impedance may also cause
Protect to light.
Step 3. Check Amplifier for audio output.
1. Verify good RCA input connections at stereo and amplifier.
Check entire length of cables for kinks, splices, etc. Test RCA
inputs for AC volts with stereo on. Repair/replace if necessary.
2. Disconnect RCA input from amplifier. Connect RCA input from
test stereo directly to amplifier input.
Step 4. Check Amplifier if you experience Turn-on Pop.
1. Disconnect input signal to amplifier and turn amplifier on and off.
2. If the noise is eliminated, connect the REMOTE lead of amplifier
to source unit with a delay turn-on module.
OR
1. Use a different 12 Volt source for REMOTE lead of amplifier.
Step 5. Check Amplifier if you experience excess Engine Noise.
1. Route all signal carrying wires (RCA, Speaker cables) away from
power and ground wires.
OR
1. Bypass any and all electrical components between the stereo
and the amplifier(s). Connect stereo directly to input of amplifier.
If noise goes away the unit being bypassed is the cause of the
noise.
OR
1. Remove existing ground wires for all electrical components.
Reground wires to different locations. Verify that grounding
location is clean, shiny metal free of paint, rust etc.
OR
1. Add secondary ground cable from negative battery terminal to
the chassis metal or engine block of vehicle.
OR
1. Have alternator and battery load tested by your mechanic.
Verify good working order of vehicle electrical system including
distributor, spark plugs, spark plug wires, voltage regulator etc.
Adjusting Gain
1. Turn amplifier gain to minimum (counter-clockwise).
2. Turn the source unit volume up to 7/8 maximum (or when
distortion is just inaudible).
3. Slowly increase amplifier gain control until adequate volume
is achieved.
NOTE: Best signal to noise and dynamic range are realized
with gain set to minimum. For a more in depth setting
procedure, contact Rockford Technical Support.
Avoid setting amplifier gain high
as noise and distortion will greatly
increase.
Adjusting Crossover Frequency
The crossover frequency can be adjusted between 50-
200Hz.The crossover is set to LP (Low Pass) only. Turn the
crossover adjustment knob all the way down. With the system
playing, turn the crossover adjustment knob up slowly until
the desired crossover point is achieved.
Phase Switch
Allows you to conveniently switch the output phase of the
amplifier between 0° and 180°. This has the same effect as
physically reversing the Positive (+) and Negative (-) speaker
wires
Input Level
Set the Input Level switch to match the outputs of your source
unit.(LO - RCA or HI - Speaker Level)
Auto Turn On(illus.-3.1)
Three different automatic turn-on modes can be selected;
REM(+12V), DC Offset, and Audio.
Remote: Set the switch to REM to use the remote turn-on
lead from your source unit.
DC Offset: Set the switch to DC Offset to detect a DC offset
from the HI-Level speaker outputs when the source unit has
been turned on.
Audio: Set the switch to Audio to detect the incoming audio
signal from your source unit and automatically turn on your
powered loaded enclosure.
NOTE: Using either the DC Offset or Audio mode causes the
REM on the power connector to have +12V out for turning on
additional amplifiers.
Punch Bass
This works along with the crossover switch on the amplifier.
When set to Low-Pass (LP) operation, this is a variable Bass
Boost. Set this to your personal preference while listening to
the system.
Over excursion and subsequent
damage may occur at high levels of
boost.
Remote Punch Level Control
When connected, the “Gain Control” is linked and allows you
to remotely control the output level of the amplifier from the
dash or center console..
