I'm getting the exact same issue. I have to turn the input gain up to 90% (9th tick out of 10) to get a reasonable level. If I turn it down half a tick or more (85-80%), it's a very drastic change. I wouldn't think it would require 90% power to get a reasonable level. Seems very odd to me. This is with multiple mic cables. I don't have another NT1-A to test. Given that it's happening to several of us with different iTwos, different cables, and different NT1-A's, I dare say it's an issue inherent to the iTwo.