General
Since the invention of the amplifier, tubes have been the most fascinating components of electronic sound technology. You don't need to be an audiophile to know that the type of tube in your favourite amplifier plays a huge part in shaping your sound. This is why Bugera offers you a large number of premium valves that are manually selected to match the tonal preferences of musicians.
They offer tubes with the Californian sound as well as valves with a distorted British grind, for instance. The different preamp tubes are a great addition to your amplifier's sound, while offering little noise an a minimum of microphonics.
There's one thing all amp tubes have in common, and that is the air-tight quality control they are subjected to before being shipped to you. When Bugera says that their tubes are manually selected, they mean that each Bugera tube is individually tested. Tone is everything for you, which is why Bugera do all they can to make sure their tubes offer a truly warm sound.
This valve, the EL84 (as it's known in Europe - it's American name is 6BQ5) is a power pentode vacuum tube. It has a 9-pin miniature base and is mostly used in the power stage of amplifier circuits - mainly for guitar amplifiers.