VTL 6550 vs. KT90?


I own a pair of VTL 750's and was looking to replace the 24 6550 tubes. Has anyone tried the KT88 or the KT90 as compared to the 6550?
hifimeomy

Showing 1 response by boonetrc

This is a really old thread, but has anyone ran KT90s in a VTL ST 150, instead of 6550? I have KT 90 225 Deluxe monos and really loved them.  Curious what the bias difference if possible would be in the ST150.  Cheers.