I just got a free model 75 from a Buddy and put it into service last week , I really like the flow path and extra room for media but YES-LOUD ,My tanks are in the garage so its not that big of a deal for Me, However it started drivin Me nuts yesterday so I started messin with it...pushed the intake tube up all the way (I have other filters at bottom level so I don't need it all the way down) and jiggled the intake a bit and it did get a lot quieter...The issue with mine seemed to be more vibration then impeller noise,so I also put some 1/2 inch polystyrene ins. between it and the tank back -that helped too. Good luck.