7
VERY IMPORTANT WARNINGS!!
In certain countries, (specifically, Nordic countries), is it totally forbidden to open up any
electronic equipment or to work on them at all unless you are a fully qualified and approved
technician. Please check the laws in your country and do not attempt to change tubes/tubes or
re-bias the amplifier if the law forbids this. In this case, please take your amplifier to a
qualified and approved electronics technician. In certain countries it is also totally forbidden to
keep or place any liquids on top of the amplifier, (e.g. beer, water bottles, glass, drinks etc).
This may cause serious electric shocks and/or dangerous situations.
OUTPUT POWER
WARNING! This amplifier has been designed to achieve a very high sound pressure level (SPL)
so caution is required when playing in high power mode or hearing damage may result.
BIASSING
(for fully qualified and approved technician only!):
Please read “VERY IMPORTANT WARNINGS” first. We strongly advise you to have re-bias jobs
of your amp done by a fully qualified and approved technician.
Information for your qualified and approved technician:
After the power tubes are being replaced by new ones your amp needs a re-bias job. To do this
the chassis of the amp does not have to be opened. The bias-pot can be accessed through a
small hole next to the power transformer using a small screwdriver. The bias can be
accurately done by using a bias device such as a TAD Bias-master. 50 Watt EL34 equipped
amps should be biased around 37 mA and 18 Watt 6V6 equipped amps should be biased around
20 mA.
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