Summary: I expected better from the Antec name to be honest. I had a few noisy fans so I bought 2 of the Standard version to replace them. When I put the first one in it was louder on high than the fan it replaced. (NZXT 120mm) Also on the high setting it had what can best be described as a chatter.
Excerpt: I must confess to being pleasantly surprised by how quiet this fan actually turned out to be. The high speed setting is about as loud as I'd expected the slower setting to be, and the slower setting I couldn't hear at all over the faint hum of my CPU fan.