Tbg, the two who took the sighted test heard no difference with the clock in or out of the house. In the NJAS test, I as the tester was the only one who knew when the clock was in or out of the system, and asked people to tell me if there was a change, not whether there was an improvement or not, though several members did put down their subjective impressions of any change they heard.
In both of these tests, there was a definite negative bias against the clock making a difference, though people were asked to keep an open mind. A far better test would be where a single subject is alone in a room listening to music and asked to tell if there were any difference in the sound of the system from time to time without knowing what was being tested or changed, if anything, in the system.
In both of these tests, there was a definite negative bias against the clock making a difference, though people were asked to keep an open mind. A far better test would be where a single subject is alone in a room listening to music and asked to tell if there were any difference in the sound of the system from time to time without knowing what was being tested or changed, if anything, in the system.