HandlingandCare:
Keep the amp safe from hard knocks and shocks. Tubes are fragile and tend to suffer
whenexposedtomechanicalstress!
Let the amp cool down before you transport it. Ten 10 minutes or so will do to spare
thetubes.
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 of flipping the Standby switch for
shortbreaks.
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
coverorflightcase.
Never use caustic or scouring detergents to clean the amp's housing, front or rear
panels.Use asoft,dampcloth orspongewithdiluted soapsudsorastandard brandof
mild dishwashing liquid instead. Never use solvents they can corrode the amp's vinyl
skinanddissolvethefrontandrearpanellabels.Keepliquidswellawayfromtheamp,
particularlytheinteriorofthehousing.
Make sure air can circulate at the front and top of the amp to allow for adequate
cooling,whichincreasescomponentlife.
Never operate the amp without an adequate load (a speaker, cabinet or suitable
terminatingresistor).
High ambienttemperatures place an additional strainon diverse components; so ifat
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
voltageoverlongerperiodscanalsoshortencomponentlife.
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
replacingtubes,thisisajobbestlefttoexperiencedandauthorizedspecialists.
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