Chapter 4: Troubleshooting - Infinity REF-704a Owner's Manual

Selecting the subwoofer phase
You can choose a subwoofer phase output of 0° or 180°. To check your sub's phase, play music with lots of bass and listen as another person
slowly flips the 0/180 degree phase switch back and forth. The correct setting is the one that gives you more bass. If you don't detect any real
difference, leave the switch in the 0 setting.
PHASE
0º 180º
Boosting the bass
Turn the dial lockwise to increase the bass output from 0 dB to +9 dB.
BASS BOOST
••
0dB +9dB

CHAPTER 4: TROUBLESHOOTING

PROBLEM: No audio and POWER INDICATOR is off.
CAUSE and SOLUTION: No voltage at BATT+ and/or REM terminals, or bad or no ground connection. Check voltages at amplifier terminals
with VOM.
PROBLEM: No audio and PROTECT INDICATOR flashes every 4 seconds.
CAUSE and SOLUTION: DC voltage on amplifier output. Amplifier may need service; see enclosed warranty card for service information.
PROBLEM: No audio and PROTECT INDICATOR is on.
CAUSE and SOLUTION: Amplifier is overheated. Make sure amplifier cooling is not blocked at mounting location. Verify that speaker-system
impedance is within specified limits. Or, there may be voltage greater than 16V (or less than 8.5V) on BATT+ connection. Check vehicle
charging system.
PROBLEM: No audio and PROTECT and POWER INDICATORS flash.
CAUSE and SOLUTION: Voltage less than 9V on BATT+ connection. Check vehicle charging system.
PROBLEM: Distorted audio.
CAUSE and SOLUTION: Gain is not set properly. Check INPUT LEVEL setting. Check speaker wires for shorts or grounds. Amplifier or source unit
may be defective.
PROBLEM: Distorted audio and PROTECT INDICATOR flashes.
CAUSE and SOLUTION: Short circuit in speaker or wire. Remove speaker leads one at a time to locate shorted speaker or wire, and repair.
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