I haven't experimented with new small tubes, maybe they have improved, I've only had luck soncially with older tubes, and even among those, pretty selective (the telefunkens seem to be more my cup of tea). I haven't tried any different power tubes in the Lamm ML2 for good reason- it's not really an option. But, interestingly, I've been experimenting with vintage rectifier tubes in my new phono stage, and there are sonic differences among them.
FWIW, I think everything makes a difference in a system, which by definition, is interdependent on each element.
FWIW, I think everything makes a difference in a system, which by definition, is interdependent on each element.