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26
EARTH PRO
ENG
User manual
8
INSTALLATION NOTES
Earth Pro 115A - 118A transport carts allow handling Earth 115 and
118 subwoofers up to a maximum load of 150 kg / 330.6 lbs.
Flybar EP115 - 118 allow the flown installation of Earth PRO
subwoofers up to a maximum load of 265 kg/584 lbs. Installation
is carried out by releasing the flybar cams and inserting them into
the seats of the boxes. The unit is then
fi
xed on the side by means of
safety pins.
9
TROUBLESHOOTING
SYMPTON
LIKELY CAUSE
WHAT TO DO
No sound
Speaker not connected to active AC
power.
Verify that speaker is connected and that the circuit is on
No sound. The speaker is connected to
working AC power but won’t come on.
Speaker power cable is faulty or
improperly connnected.
• Re-seat the power cable at both ends.
• Substitute a known-good power cable.
No sound. Speaker comes on.
Signal source (mixer, instrument, etc )
is not sending.
• Check VU meters on the source mixer.
• Verify that the tape or CD is playing.
• Use headphones to verify that the instrument is actually sending
an audio signal
Faulty cables and connections
• Disconnect and re-seat signal cables.
• Replace suspected cable withn a known-good cable
Signal sounds distorted and very loud,
PEAK light is lit most of the time.
Excessive input signal, trying to exceed
the capabilities of the speakers.
• Reduce the output level of the source.
• Turn down the level controls on the speaker.
• Use additional EARTH PRO speakers.
Signal sounds distrorted even at
moderate volumes, LIMIT light is not lit.
Mixer or other source is overdriven.
Review the Owner’s Manual for your mixer and adjust controls as
needed
• Input sensitivity (gain)
• Channel faders
• Master faders Once this is done, review the instructions in the
Quick Start section of this guide.
Lots of hiss in the sound, the mixer
controls are at very low settings.
Improper gain structure
• Reduce the level settings at speaker. review the Owner’s Manual
for your mixer and adjust controls as needed.
• Input sensitivity (gain)
• Channel faders
• Master fader
Noise or hiss heard at output.
Noisy source device
Disconnect the devices that are connected to your speaker one at a
time. If the npoise goes away, the problme is with the source or the
connectiong cable.
Hum or Buzz that increases or decreases
when the mixer level controls are moved.
Improper A/C ground or faulty
equipment connected to mixer input.
Disconnect or mute channels one at a time to isolete the
problem. Refer to the owner’s manual of the faulty equipment for
troubleshooting help.
Faulty cable between source equipment
and mixer.
Substitute a Known-good cable for the suspected faulty cable.
Hum or Buzz
Improper A/C grounding, ground loops
• ‘Lift’ the audio ground by usign an XLR/F to XLR/M adapter on
one end.
• Re-route audio cables away from AC power and lighting cables.
Excessively long unbalanced cable run.
• Use the balanced outputs (if available) of your mixer or source
equipment to drive your EARTH PRO speakers.
• Use a “DI Box” (direct injection) boc to convert your undbalanced
equipment output to a balanced output.
Improper system gain structure
Reduce the INPUT level controls and increase the output level of
your source devices
