Put like that, it does sound unreasonable
I am sure my set up will indeed be quieter than even the EXOS and minimal forced air I currently run.
EDIT - I would compare it to a 60mm Delta or a higher middle range 80mm - say a Sanyo Denki 50cfm.
I wonder if the pump should be noticeably louder than an Eheim 1250. Most people describe them as inaudible. I suppose I want to ensure I am getting the best out of my pump and set up - noise versus performance.
The noise is of a higher pitch than I would like - much like a higher rpm fan. Whilst the sound of the air moving is less irritating, the whine of the motor and blades at high speeds produces a more unpleasant sound.
I have found that some of the tubing is vibrating against other tubes and the case is still vibrating in a few places - no doubt resonantly.
I am trying to pad where necessary and shorten tubing if possible...
It is getting there - paying the price for choosing an aluminium case over a steel one!! :shrug:
