What is presence on an amp?

Presence on an amplifier refers to a controls that adjusts the amount of high-frequency content in the signal being amplified. Increasing the presence control adds more high-end frequencies to the sound, giving it more clarity and brightness. This can help the sound cut through the mix better and sound more defined.

Presence controls are most commonly found on guitar amplifiers, where they are used to shape the tone of the guitar in combination with other tone controls like bass, mid, and treble. Presence controls can vary in their design and operation, with some being simple passive controls that boost a specific frequency range, while others are active circuits that can boost or cut specific frequencies.

Overall, presence controls can be a useful tool for shaping the tone of an amplifier and getting the desired sound for a particular instrument or musical style.