Update... I have not forgotten about my promise to A/B (and preferably, blind A/B) the grounding pigtails that I thought were effective. There was a little snag...
As I mentioned, since my crossovers are sealed in a cabinet in the wall, I was going to A/B the grounding pigtails on a friend's system that I am familiar with. As fate would have it, his system is temporarily down, due to the fact that, during some crossover modding, he blew a tweeter half way across his room. And btw, the first dealer quoted him a $1300 replacement cost for the tweeter. The second dealer gave him a "great deal" at $800. That is just greedy, IMO. I don't know if it's the dealer or the manufacturer or both. I won't mention any names, but the tweeter is made in France from beryllium. It's Focal.
Anyhoo, I will make good on my promise to A/B the grounding pigtails when his system is up and running again. For that purpose, I have purchased
EVS Ground Enhancers, which are made from Litz wire, like Audio Prism's Ground Control. But the EVS version is 1/6 the price of Audio Prism's. So not everyone is greedy.
In the meantime, I've been experimenting with other forms of Magic. At the moment, it's
Hifi Tuning fuses, which do indeed seem to make an audible difference. I should probably blind A/B these when I blind A/B the Ground Enhancers, though that gives me two chances to look like a fool.
Bryon