Congratulations on getting the new filter. Let the Penguin run overnight and see how it sounds. Sometimes mine will make a little noise after cleaning it that will go away after running for a few hours. You'll see that it quiets down.
Gene Heitman - 12 tanks (11 freshwater and 1 saltwater), 206 gallons, 20+ species of fish/shrimp/snails, 52+ species of plants ... 10 years ago I just wanted 1 tank with some fish