How To Replace Amp Tubes

If you own a tube amp and want to replace old tubes, then this small guide is for you.

Changing and replacing old amp tubes with new ones is important because, over time, tubes wear out and lose their power.

Replacing guitar amp tubes is not difficult, but it requires some basic knowledge and precautions.

And that’s exactly what I’m going to explain in this article. I have replaced amp tubes many times and can share my knowledge.

1. Identify Old Tubes

old guitar amp tubes

The first step is to identify the tubes that need to be replaced. All tube guitar amps have at least one power tube and one preamp tube.

The power tubes are responsible for amplifying the signal to the desired volume, while the preamp tubes shape the tone and add gain.

To identify the tubes that need to be replaced, consult your amp’s manual or look for markings on the tubes themselves.

These tubes may also be color-coded or numbered. Make sure you have the correct replacement tubes for your amp before proceeding.

Before replacing any tubes, make sure your amp is turned off and unplugged from the power source. This is important for your safety and to avoid damaging the tubes or the amp.

2. Remove Old Tubes

Once the amp is turned off and unplugged, let it cool down for a few minutes, and then, carefully remove the old tubes from their sockets.

Avoid touching the glass part of the tube, as this can leave oils from your skin that can damage the tube. Instead, use a cloth or gloves to handle the tubes.

3. Install New Tubes

new guitar amp tubes

Once you have removed the old tubes, it’s time to install the new ones. Make sure the new tubes are the correct type and have the same pin configuration as the old ones.

Gently insert the new tubes into their sockets, making sure they are seated firmly and securely.

To know how to properly install new tubes, you can use the user manual, watch Youtube tutorials, or find articles on the internet.

4. Bias Your Amp

Some amps require a bias adjustment after replacing the tubes. Bias refers to the voltage that is applied to the tubes, and it needs to be set correctly to ensure optimal performance and tube lifespan.

If your amp requires a bias adjustment, consult the manual or take it to a professional technician.

5. Test The Amp

Once you have installed the new tubes, turn on the amp and let it warm up for a few minutes.

Test the amp to make sure everything is working properly. Check the volume, tone, and gain controls, and listen for any unusual noises or distortion.

If everything sounds good, congratulations, you have successfully replaced your guitar amp tubes!


Replacing guitar amp tubes is a relatively simple process, but it requires some caution and attention to detail. Make sure you have the correct replacement tubes, turn off and unplug the amp before starting, and be gentle when handling the tubes.