Just love the GIAII I bought last year . I have used them on six different speakers and they are a necesitty now . Only problem is having to take them off and put them back on each speaker that comes through my bi monthly rotation . Could use a few more pairs ! The biggest improvement so far has been on King sound -King and KS17 electrostatic speakers . Also nice improvement on Klipsch RF7 as well. What I get is a more focused imaging and tighter bass response .