JBL EON PowerSub G2 manual

Signal sounds distorted even	Mixer or other source is overdriven	Review the Owner’s Manual
at moderate volumes, PEAK		for your mixer and adjust
light is not lit.		controls as needed
		• Input sensitivity (gain)
		• Channel faders
		• Master faders
Hum or Buzz that increases	Improper A/C ground or faulty	Disconnect or mute
or decreases when the mixer	equipment connected to mixer	channels one at a time to
level controls are moved.	input	isolate the problem. Refer
		to the owner’s manual of the
		faulty equipment for
		troubleshooting help.
	Faulty cable between source	Substitute a known-good
	equipment and mixer	cable for the suspected
		faulty cable.
Hum or Buzz	Improper A/C grounding, ground	• Connect all speakers to a
	loops	common power circuit.
		• “Telescope” the audio
		ground by using an XLR/F
		to XLR/M adapter with
		Pin1 disconnected on one
		end.
		• Re-route audio cables
		away from AC power and
		lighting cables.
	Excessively long unbalanced cable	• Use the balanced outputs
	run	(if available) of your mixer
		or source equipment to
		drive your EON speakers.
		• Use a “DI” (direct injection)
		box to convert your unbal-
		anced equipment output
		to a balanced output.
	Improper system gain structure	Reduce the INPUT 1, LINE
		2, and LINE 3 controls and
		increase the output level of
		your source devices.
Speakers feedback and howl	Microphones are pointed into the	Move the speakers so they
when the microphone volume	speakers	do not point into the micro-
is turned up		phone’s pick-up pattern.
	Equalizer settings are incorrect	Locate the feedback fre
		quency and reduce it using
		the mixer EQ or an external
		equalizer.
	Excessive gain	Reduce the gain at the
		mixer and move the micro-
		phone closer to the sound
		source.

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