+1 on this suggestion. This is what I used in my QS V4 amps when I owned them
audioman58
3,269 posts
KT 77 Gold lions sound best kind of a mix between a kt88 and el34
Quicksilver V4 tubes
My monoblocks are from 2006 and I'm looking to retube them I've had the KT 88s in them and now I'm running EL34's but would like to go back to a more powerful tube such as maybe the KT150 would like some suggestions