The coveted EI Type 2. This quad is from my private stash, and has never been used or plugged into an amp. Original boxes and matching by Jim McShane (McShane Design). These are genuine Type 2's, as you will see the spotty welds, that are a trait of this tube.
Largely acknowledged as one of the very best sounding tubes from the 6550 family. The KT 90 type2 ticks all the boxes, A balanced signature with authority, excellent bass, great mid-range, cool running and reliability are some of it's traits. After having a set of these in my amp for the past 6 years, I have never been tempted to roll any others.
Unfortunately NATO bombed the EI factory in the early 90's and the tooling was lost. Type 3's there after are a very different species.