Best 12AX7 For Audio Genalex Gold Lion ECC83/B749 is the ultimate in current production 12AX7. Gold Lion ECC83 delivers a full sonic range with excellent articulation. Like all Gold Lion Tubes, Gold Lion ECC83 is built with meticulous quality, which makes it ideal as the premium upgrade for any audio 12AX7 application.
Finally, do preamp tubes affect tone?
Really overdriving a preamp tube and hitting it hard creates richer harmonics, distortion, and sustain. Backing off the gain can give you a shimmery clean sound. You can think of the preamp tubes as the tone shapers of your guitar amp.
No less, do 12ax7 tubes need to be biased? You do not have to bias pre-amp tubes, period. You normally do have to bias power tubes. Many/most amps that run EL84 power tubes do not have to be biased, because of their electronic design.
The published difference is that the 12AX7A can be used with heater circuits wired in parallel and series, whereas the 12AX7 can only be used in parallel circuits. The designation has nothing to do with a spiral filament. You will not have to worry about parallel vs.
You should replace them when they are dead. *There is no set rule for how long they last, but in general, they last longer than power tubes. *Maybe twice as long or better life expectancy for power tubes. *They are also self-biasing of course, so don't be afraid to change them yourself.
So if you don't bias your amp correctly you'll face the following scenarios: ... Valves will probably have a far longer life because they aren't being overworked but the amp will never sound the best that it can. Run the valves too hot (Under-biased) – This means you'll cook and saturate the valves very quickly.
Yup. To elaborate, the power caps for your tubes are rated 450 volts and up, which mean they charge to over 600 volts. This won't necessarily kill you, though it can, it will definitely hurt. ... Definitely a good primer for anyone interested in working on tube amps, and useful for any owners.
Tube amps are "better" than SS because they naturally distort at higher volumes and have more individual "character", but they're heavy, more fragile than SS, and can sometimes be too heavy for their own good.