Hi Guy,
Yes, I have tube rolled trying to get the best overall
sound and quietness. I even called Quicksilver, and the person on the other end, told me that my Quicksilver pre was not a good match for Khorns; but I finally found the right tubes to reduce the noise a bit. Anyway, I had my wife sit center stage as I swapped the inputs from the preamp directly to the Macs and she agreed that the soundstage seem to be larger without the Quicksilver pre. (The amps were powered off during the swaps and restarted.) I agree, the Quicksilver is a quality product, but to my ears, it seem to be a bit lean. I'll try another A/B test to check myself. I really would like to keep it because it is tube and has a phono section.
Calvin