Audio System Symptom Troubleshooting - Audio sound is weak or distorted

Audio sound is weak or distorted NOTE: Set the fader and balance position to the center. Check to see if the problem occurs regardless of discs. Does it occur?
YES | - | Go to Step 2 .
NO | - | Disc failure.■
Check the speakers for any damage. Is there any damage?
YES | - | Substitute the speakers and recheck.■
NO | - | Faulty audio unit.■