• Keep your EDB-2 H.E and signal cables away
from devices with strong magnetic fields, or
mobile/cellular phones. These include large AC
mains transformers, generators, lighting control
systems and non earthed fluorescent lighting
• Switch off equipment which is causing
interference. Keep signal cables away from mains
and speaker leads
• Check mains power leads are not coiled
• Use highly screened microphone or instrument
leads, with metal shielded connectors and good
connections
• Shorten or uncoil cable runs
• When using the XLR to Jack adaptor for a D.I.
output, set the Earth/GND LIFT switch to cut earth
loop hums if required. Otherwise leave Earth Lift
switch Off
• Use "Notch Filter" with narrow "Q" to hone in on
troublesome hum and cut it (at around 50-60Hz) or
cut fluorescent light buzz (at around 100-130 Hz)
• Mains Filters prevent noise transmitting through
mains power which can affect amplifiers
• If lighting is causing hum and/or buzz, power your
amplifier from a different AC mains ring that is not
being used for stage facilities or lighting
• Hum and buzz can be generated in a stringed
instrument where there is no earth connection
between output jack, strings or any tail piece
P.65
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