ayang02
500+ Head-Fier
true your personal results cannot not be generalized but data is still data : knowing that you cannot differentiate spring1 from spring2 in a blind test, is a data point that alone is not very significant but if the next 3 or 4 reviewers cannot either differentiate them, there is a high probability i will not either and therefore i should not think about upgrading from my spring1 to spring2
Did you perform the grill mod on your Spring 1 by the way? Mine was not modded so I would imagine the blind test would probably be a lot more interesting between a grill modded Spring 1 vs Spring 2. Anyways, someone will probably measure the Spring 2 soon so maybe you could wait until then and compare the FR graphs: that is likely more conclusive than anything I have to say.