Apache Fans

[Dyewitness]

Hey all

I just installed 2 Apache Fans on my Antec Kuhler 920 and ive noticed that i can no longer hear them ramp up lol
Is this normal? are they this quiet ? lol
The temps have been reduced a little from the stock fans also so i know they are doing something

 

[Dyewitness]

These are the fans I used. damn they are quiet lol

https://www.overclockers.co.uk/showproduct.php?prodid=FG-057-AK

 

[Dyewitness]

do you also find that you cant hear them ramping up? lol