![]() ![]() Some amps are more forgiving than others and it's true that in many cases you can get away without biasing. ![]() In fact many guitarists never bias their amps. You don't ALWAYS need to bias tube amplifiers after a tube change. Those are the only two reasons to mess with the bias. You have changed the output tubes and the sound is still not as good as when the amp was new.you’re not happy with the sound or you want to play around with the sound). You (or someone else) needs to bias tube amplifiers if: High voltage capacitors retain their charge, sometimes for days, so always aim to bias tube amplifiers safely. Don’t touch anything inside with your bare hands even if the amp is switched off. This article is NOT an incitement for you to bias tube amplifiers or start taking your guitar amplifier to bits! A little knowledge is a dangerous thing. So don’t mess inside your guitar amplifier unless you know what you are doing. If you want to bias tube amplifiers just be aware that there are lethal voltages inside the chassis. (That's me!) They are available as a direct download to your computer and are written for specific amplifiers with colour photos of the full procedure. ![]() The manuals that we sell on how to bias a specific amplifier are carefully written by a senior electronics engineer with 40 years experience. It's written by well-meaning people but a little bit of knowledge is a very dangerous thing. There's a lot of free information on the internet. I aim to explain what ‘bias’ is, and how to find out how to do it. This short article is an introduction on how to bias tube amplifiers (aimed at guitar amplifiers). We also sell a range of bias manuals written for specific amplifiers that you may be interested in. ![]() Just understanding the principles of how your amp works is well worth the time and effort. Do you own a tube guitar amplifier? Yes? Then it's good to know how to bias tube amplifiers, or we need to keep paying a technician to bias tube amplifiers for us. ![]()
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