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

 

15

 

 

 

 

the sound source.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 14 Page 16
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Image 15
JBL Professional G2 manual Improper A/C ground or faulty
Page 14 Page 16

G2 specifications

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