JBL EON G2 User Manual - page 15
15
Symptom
Likely Cause
What to do
Hum or Buzz that increases or Improper A/C ground or faulty
Disconnect or mute channels one
decreases when the mixer level equipment connected to mixer
at a time to isolate the problem.
controls are moved.
input.
Refer to the Owner’s Manual of
the faulty equipment for
troubleshooting help.
Faulty cable between source
Substitute a known-good cable
equipment and mixer.
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 Pin 1 disconnected.
Re-route audio cables away from
AC power and lighting cables.
Excessively long unbalanced
Use the balanced outputs (if
cable run.
available) of your mixer or source
equipment to drive your EON
speakers.
Use a “DI” (direct injection) box
to convert your unbalanced
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.
The inputs from INPUT 2 & 3
MIX/LOOP SWITCH set
Set the MIX/LOOP SWITCH to
aren’t coming out of the
improperly.
the MIX OUT position
OUT connector.
(depressed). See the CAUTION
in the “Switches” section of this
manual.
The speaker connected to the
MIX/LOOP SWITCH set
Disengage the MIX OUT switch.
OUT connector goes up and
improperly.
See the CAUTION in the
down in volume when I adjust
“Switches” section of this
the INPUT 1 control on the 1st
manual.
speaker.
Speakers feedback and howl
Microphones are pointed into the
Move the speakers so they do not
when the microphone volume is speakers.
point into the microphone’s pick-
turned up.
up pattern. See the section on
“Loudspeaker Placement and
Mounting” on page 20.
Equalizer settings are incorrect.
Locate the feedback frequency
and reduce it using the mixer EQ
or an external equalizer.
Excessive gain.
Reduce the gain at the mixer and
move the microphone closer to
the sound source.