I'm using Voskhod 6n23p which is a Russian 6922 variant with excellent results in my c-j Classic 2 SE. I tried a few EH and they were noisy either right off the bat or very shortly after install. The 6n23p tube sounds better in my opinion, well balanced, excellent dynamics , excellent mid and highs. This tube is rugged,very quiet, and long lasting, 1.5 years with no problems so far.