To add, I know there has been tweaks that are hard to tell the effect. Many a time I have gone back and forth, is this better, or is that better? etc...
But, the 1260 is not one of those tweaks. You system will sound a lot better, you will know it, if you know your system. However it did take a few days to reach full effect. I will say this product is better than the yellow QSA fuses that are raved about.
I understand why you think it is important to do a a/b test. But to perform an a/b listening test to another person system that you are not familiar with, may or may not give you the conclusion you are expecting.
You need to try it in your own system. Don’t be so cheap! Sheesh!
The cost for the product is small compared to other things we invest in this hobby.
Believe me, I have never been shy about stating my opinion on audio products performance. That is; good, bad, waste of money etc. I have tried liquid graphene, Furutech nano liquid, liquid gold, pro gold, PPT paste etc. etc. This product is very good.
ozzy