Guys, I agree that humidity makes a difference, but I have two dedicated lines to my system. Each is individually grounded to very long copper rods and he used the exact same length runs for each of very high grade copper. I don't remember the make as it was 13 yeas ago when they built the place. I use AQ outlets and Hurricane cords into the Niagara power deal that Garth designed. The bottom line is that I like where my system it at and upgrade when I feel it's worth it and when I have the money to do so.
The Quatro's are a special speaker to my ears for the price. The company line from Vandy is that it's the sweet sport for the dollar in their line. I fully agree with that. I am still looking for a better amp than my Ayre AX5/20. The integrated is a great one, but I'm going to get a special amp/pre that will give me even more solid/strong bass. I wanted to get the speakers set up with the plinths first. I also have a pair of Audioquest Thunder cords being made (you need an old style connector on the amp end since there isn't clearance for the new beefy connector Garth used. That will help get a tad more bass also.
I have spoken to a couple of other guys who have done this 300 dollar tweak and they all had glowing things to say about it. Most have said that it gives the bass a bit more authority and it tightens it up greatly. One person said he feels the soundstage is grounded even more. I just have to make sure I get the rake correct when doing this. He said 4 more washers to the rear spike, so that's where I will start. I'm sure that will do it. Unlike the platform upgrade they have for the 7's where the cones are in the granite slab on the floor, he told me to not even worry about that and just have the slab sit on the carpet. I dont' know how heavy each one will be, but it's going to be very very heavy for sure. Yes, I'm certifiable. lol