I can only share my experience from what my ears have told me after experimenting on this matter. I've tried my Lumin T2 with Leedh volum control into my JC1+, I've then tried a JC2 as a pre with same source but with disabled Leedh before I went with ARC LS28 witch is where I'm at now. I can assure you that even my grandmother could tell there is a difference. I will not go into discussions if sq is coloured or not with pre but I know that I will prefer a pre any day, any week....
