Adjusting the fan of the FANTEC MB-X4U31

I recently bought the FANTEC MB-X4U31 which has a 92 x 92 x 25mm fan that’s quite loud and always active. The manufacturer might have set the fan curve to constant 100% because I’ve yet to see a difference of the fan speed and loudness.

I’m curious if anyone has any experience with this specific, or similar case, and can recommend other 92mm fans that are quieter, or knows how to adjust the fan curve.

I might have to take this thing apart to solve the issue, but I’m hoping someone has some details.