Ruby KT77-CZ

The Ruby KT77-CZ have crystal clear 3-D cleans, extended lows and highs. This KT77 has very thick articulate breakup. For the most part, the Ruby KT77-CZ's will bias up same as an EL34/6CA7. As always, please check with your amp tech before swapping different tube types. Screened by Ruby Tubes with a 6 month warranty.