Oui cathode biased pas besoin de tech:
Citation:
Power tubes in the Tiny Terror, Rocker 30, AD5, AD15, and AD30 series of amplifiers do not need to be biased. Power tubes in all other Orange amplifiers should be biased by a qualified amp technician when they are replaced. Failure to bias power tubes can result in shortened tube life and damage to your amplifier. Improperly biased tubes can also affect your amplifiers tone.