I didn`t have the sub on during the first comparisons as I thought that might mask any difference but on the second more prolonged listen I turned it on and there seemed to be a big (better) change,now I don`t know if this is probable or even possible but the sub seemed to be producing lower,clearer bass. I played 3 very familiar albums and what I can say is that the level of detail was noticeably increased,I was hearing things not apparent before. I connected the Chameleons to the cd input on the amp but again don`t really know if that makes a difference from line 1 during the A/B comparisons.
Overall I think my original I/C`s (£20 off e-bay) were the weak link in my set up and am now very pleased I took Joels` advice 🙂