KT150 to KT120..or KT120 to KT150

@decooney, I purchased a set of Silver 88 mono-blocks back in 2014. When I ordered them, I paid extra for the KT150 customizations. I had always been running KT150s, but recently tried some KT120s. I am finding less high frequency extension with the KT120, and less midrange lusciousness as well. I run the KT150 at 50ma, and the KT120 at 44ma.  Maybe I have not given the KT120 long enough, but they came out of a friend's CAT amps, so I think they have been run for at least a couple hundred hours. I am curious as to what bias you are running the KT120s in your Quicksilver amps.

Thanks

@decooney I just saw your follow-up a year and a half late. I did end up trying a different matched quad of KT120s in my Silver 88s, and they sound very good.