Ibiza sound COMBO208-VHF Manuel D'utilisation page 6

Do not daisy chain the speakers! No more than one 8 ohm speaker should be used on each speaker output. The speakers
are optimized for the powered mixer. The use of different speakers could result in bad performance.
Problem
No sound
Distorted sound
Sound is thin
Sound is deep-toned and booming
Hum
Output noise
Feedback
SPECIFICATIONS
Woofer....................................................................................................... 2x 8"/20cm
Magnet .................................................................................................................. 20oz
Voice coil ................................................................................................................... 1''
Impedance ......................................................................................................... 4ohms
Sensitivity .................................................................................................. 98dB+/-3dB
Max SPL ............................................................................................................... 98dB
Frequency range ........................................................................................ 70Hz-20KHz
VHF mic frequency ............................................................. 202.75MHz and 208.6MHz
Voltage input .............................................................................. 100-240Vac 50/60Hz
Dimensions ......................................................................................... 60.7 x 25x 45cm
Weight ................................................................................................................. 12kg
COMBO208-VHF
Cause
No power
Volume is turned down
Bad connections
Bad cables
Input overloaded
The system is overloaded
Too much treble
Not enough bass
Wrong speaker connection
Not enough treble
Too much bass
Bad grounding
Long cable runs
Wrong gain setting
Problem with a source device
Unused channel volumes too high
Microphone is too close to the
speakers
Solution
Check if the mains plug is properly
fitted into the wall outlet and into the
mixer.
Check if the wall outlet is powered
Check if the mixer is switched on.
Turn up the channel and the master
volume.
Check if the source device's volume is
turned up
Check all connections to the mixer
Check if the speaker cables are in good
condition.
Reduce the channel volumes.
If you use an external device, reduce
the volume of that device.
If the LIMIT indicator lights up, turn the
master volume down.
Reduce the treble control
Increase the bass control
Check of all speakers are properly
connected
Increase the treble control
Reduce the bass control
Plug all mains leads into the same
outlet
Don't use unbalanced signals on longer
cable runs.
Reduce the input levels and increase
the output levels of your source
devices.
Unplug all input sources one by one
until the noise stops. Then you know
which unit creates the problem.
Set the volume of all unused channels
to 0
Place the speakers between the
audience and the microphone
6