Fuck seriously? Fuckin Hydropon store told me that I should go with the 4 inch vortex because it's dead quiet and works great. How much of a noise difference we talking here? I just want to be able to have it by next Monday
wrong, that sunleaves shouldnt be loud bro.
seriously....it isnt sealed with polymer casting for nothing!
vortex is in a metal casting.... talk about noise.
now if what you are talking about is vibrations and air movement...that has shit to do with the fan itself.
you should always sit the fan on something rubber or something to absorb vibrations! using rubber grommets.... or hang with bungi cords.
insulated ducting will help with the air whooshing thru the duct.
and if you are still having problem, yet you've done all of my suggestions.....well i suggest you get a duct muffler/silencer!