What is the Difference Between the 12AX7, 12AT7, and 12AU7 Preamp Tubes?

12AX7, 12AT7, and 12AU7Let’s take a look at the less glamorous, but equally important type of amplifier tube – the preamp tube.

The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. In many cases, these tubes are interchangeable and can easily be swapped. We will take a look at why you might, or might not want to swap out the different types of tubes.

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Power Tube Differences: EL84, EL34, & 6L6

The Power Tube: Differences Between EL84, EL34, & 6L6When you start to push an amplifier, the characteristics of these tubes become more apparent.

Power tubes can have a dramatic effect on your amplifier’s sound. At low volumes, the difference between one tube and another can be difficult to decipher; it’s almost not worth talking about. Once you start to push a little air, however, your amplifier will show off what it can do and the power tube will display its individual characteristics more. Keep in mind, that by using pedals, you can make one amp sound pretty much like any other one, so this discussion is focused on how a few of the most popular power tubes differ from each other when using the amp, and not the pedals, to get your sound. Continue reading “Power Tube Differences: EL84, EL34, & 6L6”