Hi,
I have both a KSA100s & pair of FPB450mcx. I searched a long time for a good pre-amp match for those amps. In all the trials I did (Krell KCT, KRC-HT, KRC3; Goldmund; Levinson; Adcom), I found that the Pass Labs X0 & Audio Research Ref 1 were the best. I ended up with both. Depending on your budget I would recomend you try the Pass Labs X1, X2.5 or Audio Research SP9, they will bring out the best at a better price point. May be you should try a conrad johnson preamp as well.
Christian
I have both a KSA100s & pair of FPB450mcx. I searched a long time for a good pre-amp match for those amps. In all the trials I did (Krell KCT, KRC-HT, KRC3; Goldmund; Levinson; Adcom), I found that the Pass Labs X0 & Audio Research Ref 1 were the best. I ended up with both. Depending on your budget I would recomend you try the Pass Labs X1, X2.5 or Audio Research SP9, they will bring out the best at a better price point. May be you should try a conrad johnson preamp as well.
Christian