If I were to take a double blind test, the biggest problem would be that I am completely unfamiliar with the entire audio system being used in the test.
The place I notice differences the quickest and easiest is at home; for the simple reason that I have a long memory of how it sounds and feels. So anything new introduced is immediately apparent.
At a store, a friends, an audio show, I can get an pretty quick impression of the entire setup, but individual items are hard to differentiate. If I spent all day, maybe I would reach a point where small changes were easier to distinguish. In those tests, they won't give you all day for your ears to adjust. They won't even give you ten minutes.
The place I notice differences the quickest and easiest is at home; for the simple reason that I have a long memory of how it sounds and feels. So anything new introduced is immediately apparent.
At a store, a friends, an audio show, I can get an pretty quick impression of the entire setup, but individual items are hard to differentiate. If I spent all day, maybe I would reach a point where small changes were easier to distinguish. In those tests, they won't give you all day for your ears to adjust. They won't even give you ten minutes.