I had an Ipad 2, and now i bought an Air 2. I notice that the volume with headphones is a litle bit lower then my old Ipad 2. Can anyone tell me if this is normal?
No. They should be the same for all of them. I suggest trying to get a replacement for it because it seems it has a faulty headphones port (first take it to an Apple Store and get them to run diagnostics or something on it).