@samzx12
Which higher powered tube amp did you just try and how many watts?
I’ve long used my Conrad Johnson Premier 12 140w/side mono blocks and they seem to drive anything with grip and verve, Thiel 3.7 And 2.7s included.
I owned a 55 w CJ tube amp before those and the difference moving up in power and amp design to the Premier 12s was quite dramatic. Mostly in the sense of focus, density, punch, grip and sense of power.