S E R V I C E & R E T U R N S - Memphis Power Reference Series Manual

When troubleshooting your subwoofer, speaker wires should be tested first.
Poor Bass Response
• Check the system phasing by switching the positive and negative speaker wires on the subwoofer. If the bass response
improves the subwoofer was out of phase. Confirm woofers are wired to the correct impedance for the amplifier
• 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.
Amp Red LED is Illuminated
• Speaker or wire is shorted
• Battery voltage too low
• Battery voltage too high
• Amplifier has overheated due to improper ventilation
Please consult with your local authorized dealer if you experience issues with your unit. You may also contact Memphis
Audio customer service at 800-489-2300 or email tech support directly at: techsupport@memphiscaraudio.com.
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.
PROLONGED EXPOSURE TO MEMPHIS BASS CAN CAUSE PERMANENT HEARING LOSS AND DAMAGE
TO YOUR EARS. USE CAUTION BUT DON'T SAY WE DIDN'T WARN YOU.
CAUTION
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