JBL EON PowerSub G2 User Manual

Page 12

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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.

13

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