Yup, fans are a bit loud, but it is not really noticeable in a jamming/gig situation. You could put a quieter fan in it if it bugs you, or if you need it whisper quiet for recording - I don't have the need myself, and kinda prefer just to ignore it. I even wonder if it is really needed, as I have never had a tube amp "overheat" on me. But since is there by design, I just leave it alone. Interested to see other people's take on the fan though, cool question.