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Installation Information
Memphis Audio recommends the installation of our products to be performed by an Authorized dealer. Attempting
an installation project on your own or through an unauthorized source may result in damage to your products and
may potentially void your warranty.
Amplifiers are generally mounted in the hatch/trunk area of your car or SUV or behind the seat of most pick up
trucks. Select a location that provides adequate ventilation. Avoid mounting the amplifier with fins facing down.
Amplifier should be secured using the screws provided.
For your safety, always inspect the mounting location carefully to ensure you are not drilling into any electrical,
hydraulic, fuel or fluid lines. Always check your speaker load with a multi-meter before connecting the amplifier.
Connecting any speaker load lower than the rated impedance of the amplifier will result in damage to the amplifier.
Damage of this nature is NOT covered under warranty. Please pay close attention to what connections are made to
the amplifier.
If you are uncertain or uncomfortable proceeding with your installation, please contact your local
authorized Memphis Audio Dealer
When troubleshooting your amp, speaker and speaker wires should be tested first.
No Output:
• Confirm all wiring is firmly connected.
Both +12V and REM terminals must have +12 Volts present and GND must be connected to chassis' ground or to
the negative battery terminal.
• Confirm the signal source is connected and supplying an output signal. To confirm the amp is working, connect
an RCA patch cord to the line inputs of the amplifier (do not connect the other end of the patch cord). Briefly tap
the center pin of each disconnected RCA with your finger. This should produce a noise (brief static or hum) in
the speakers.
• If the amp is hot, check the speaker impedance or load. The total minimum impedance of all speakers should
not be lower than the rating of the amp.
Only One Channel Works:
• Confirm the speaker terminal strip connections are firmly connected.
• Check "balance" control on your signal source.
• If using RCA Low-Level inputs, reverse the input plugs at the amplifier. If the channel that is silent reverses
position, the problem is in the source unit or connecting cable.
Weak Output
• Check input sensitivity control adjustment.
Unwanted Noise
• Whine that increases and decreases with engine speed - confirm the Amp & Source unit are grounded properly.
• Clicking or popping noise at a rate that follows engine speed - this is often induced by the vehicles ignition system.
Confirm that the vehicle is equipped with resistor spark plugs and wires. The ignition system may need service.
• Noise can be caused by routing speaker input wires too close to the light wires and other accessory wires in the
vehicle. Re-route wires to avoid unwanted interference.
• If above steps do not improve/reduce noise, the system should be checked by a professional audio installer at a
Memphis Authorized Dealer.
Red LED is Illuminated
• Speaker or wire is shorted
• Battery voltage too low
• Battery voltage too high
• Amplifier has overheated due to improper ventilation
Warning
Troubleshooting
Power Supply Connections
Install the fuse at the battery last!
CAUTION
Use conventional stranded copper wire for all connections. Finish the ends of the wires at the amp and vehicle with
proper size terminals. Poorly made connections and/or inadequate wire size will generate excessive heat and may
lead to equipment failure.
12 Volt + Connection
make the 12V+ connection directly at the positive battery post using the proper wire size and fuse listed below, The
fuse should be installed within 18" of the battery. This fuse is vital to protecting the vehicle from damage in the case
of a dead short. The fuse value at the battery should be at least equal to the total fuse value of all the amplifiers
being used.
Model
Amp Kit
PRX500.4V
4GKIT
PRX800.5V
4GKIT
PRX500.2V
4GKIT
Ground Connection:
Make ground connection directly to the chassis of the vehicle as close to the amp as possible. Make sure this
connection is made with the same wire size as used for the 12 volt connection. Ensure that all dirt, grease, paint and
coatings are removed prior to attaching the ground wire to chassis.
Remote Turn On
Remote turn on should be connected to the source unit's remote turn on lead or power antenna output wire. When
using the power antenna wire, make certain it does not lose power when any source other than the radio is selected.
Power Connections
CAUTION
Model
Amp Kit
PRX500.1V
4GKIT
PRX1000.1V
4GKIT
PRX1500.1V
0GKIT
-
+
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