JBL S4Ai, S4HC, S4VC manual Troubleshooting

TROUBLESHOOTING

SYMPTOM	PROBABLE CAUSE	SOLUTION
Bass is very weak	• Subwoofers are wired out	•Make sure that positive terminals on the
	of phase	subwoofers go to the positive terminals
		on the amplifiers (red) and do the same
		for the negatives.
	• Subwoofers have not	•Experiment with different locations.
	been placed optimally
Poor or smeared imaging	• Poor room acoustics	•Use absorptive materials to minimize
		early reflections.
		•Aim speakers at listening area.
	• Poor program source	•Check another program source.
	• Improper polarity	•Check polarity of wire connections.
Indistinct dialogue	• Slap echoes	•Add absorption or diffusion materials.
	• Miscalibration of center	•Check output levels of surround processor.
	channel output level
Uneven surround coverage	• Poor speaker placement,	•Place surrounds according to THX
	strong reflections	specifications.
		•Add absorption and/or diffusion materials.
	• Excessive absorption near	•Remove absorptive material to provide
	surrounds	surround reflections.

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