Handling and Care:
* Keep the amp safe from hard knocks and shocks. Tubes are fragile and tend
to suffer when exposed to mechanical stress!
* Let the amp cool down before you transport it. Ten minutes or so will spare
the tubes.
* Tubes take some 20 seconds to warm up after you switch the power on, and
about two to three minutes before they are able to pump out full power. Make
a habit of giving your amp plenty of time to get toasty and flipping the Standby
switch for short breaks.
* In order to spare the power tubes and prolong their lifetime, we recommend to
set the Stand By switch to
(0 position, that is) before you switch the
amp on. After a period of 30 seconds you may activate the poweramp by
flipping the Stand By switch.
* Avoid storing the amp in damp or dusty rooms to spare jacks, switches and
potentiometers. If you don't use the amp all the time, I recommend that you
drape a covering over it to prevent the intrusion of dust. Even better, keep it in a
transport cover or flight case.
* Never use caustic or scouring detergents to clean the amp's housing, front or
rear panels. Use a soft, damp cloth or sponge with diluted soapsuds or a
standard brand of mild dishwashing liquid instead. Never use solvents they can
corrode the amp's vinyl skin and dissolve the front and rear panel labels. Keep
liquids well away from the amp, particularly the interior of the housing.
* Make sure air can circulate at the rear and top of the amp to allow for adequate
cooling, which increases component life.
* Never operate the amp without an adequate load (a speaker, cabinet or suitable
terminating resistor).
* High ambient temperatures place an additional strain on diverse components; so
if at all possible, avoid operating the amp at temperatures far higher than 30°C
for longer periods. Running the amp at mains voltages exceeding the nominal
mains input voltage over longer periods can also shorten component life.
* Replace tubes with selected tubes that satisfy ENGL selection criteria to forestall
microphonic properties, undesirable noise and unbalanced power amp signals.
Because power tubes' idle current (bias) must checked and possibly adjusted
when replacing tubes, this is a job best left to experienced and authorized
specialists.
Stand By
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