Gotta agree with you here Martin, what the SPL meters are reading seems to have little bearing on how okay the noise is.

Odd that the GT is so good at 25CFM+ and kinda has a weakspot at 18-25CFM. Even at 40CFM though, it's better or as good, to my ear, as any other fan at 25CFM.

In that 18-25CFM range the GT is weak, seems the Yate is the best to my ear. AP121 is pretty bad all over. Rosewills fare well, same with the Noctua, but the Noctua is way expensive and sounds like it's "doing more work" than the Yate to me.

Full-speed GT is really impressive though, the whine is gone and it's moving a ton of air for how little noise there is.

Great stuff, thanks for doing it

Do you have push+pull Yates on the docket?