Tom, I probably should have tried some tube rolling in my ARC LS16 too. I was using it with the stock Sovtek 6922 tubes. It wasn't bad at all and it had all the qualities I like in a tube preamp except it could have been a little more extended covering the frequency extremes and just a tad bit warmer in the mids. But thats just my preference. Others might consider this unnatural or even criminal. ;-)
As it turns out, my used Conrad-Johnson PF-R solid-state preamp arrived today while I was at work (so I had to come home early. Its Friday, after all!) I placed the CJ PF-R in my system only 30-minutes ago and so far I REALLY like what I'm hearing. Sure, its solid-state but it has that "CJ family sound" that matches very well with my CJ Premier 11a. Back to the sofa for some critical listening.
As it turns out, my used Conrad-Johnson PF-R solid-state preamp arrived today while I was at work (so I had to come home early. Its Friday, after all!) I placed the CJ PF-R in my system only 30-minutes ago and so far I REALLY like what I'm hearing. Sure, its solid-state but it has that "CJ family sound" that matches very well with my CJ Premier 11a. Back to the sofa for some critical listening.