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I'm pretty much homebound right now so I'm bored but the tunes are good, so check this out..I added EVS Ground Enhancers inside each shell attached to the negative terminal in each ear cup/driver.WOW!!!!! This was what I was thinking about when Bilavideo told me he'd send me some shells. I figured while I'm in there messing around I'd install an extra pair I had and make uber Grado's and it worked... boy did it work!!!