Use only Headway Music Audio supplied 18v PSU:
As per EDB-1, EDB-2, EDB-2 H.E, EDM-1, EDM-1 H.E,
or forthcoming EDB-2 V.A.P, Headway Music Audio Ltd
will not honour guarantees where an incorrect Power
Supply has damaged a pre-amp
19.2.9 WEEE Regulations & Environmental Disposal:
Power Supplies, Batteries and Pre-amplifiers should
NEVER be randomly disposed of in a bin or sent for
landfill disposal. Repair and service Pre-amplifiers for
long term use and use local re-cycling and electronics
collection schemes
RoHS Regulations: EDB-2 H.E and other Headway
products are made in accordance with RoHS Regulations
and are made free of lead and other environmentally
damaging substances
20 TROUBLE-SHOOTER CHECKLIST
20.1 AVOIDING ACOUSTIC FEEDBACK & ROOM
RESONANCES
• Turn the amplifiers, instruments and microphones
down and turn off when not in use
• Re-angle instruments and Mics to the side of, off
axis or behind the speaker cabinets
• Try re-positioning speakers
• Use "Notch Filter" to hone in on and cut
troublesome frequencies
P.61
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