6-25 wpc at 50 ohms?
I did that Pass amp with tube/hybrid thing in various combos. Its a winner for so many speakers and cans.
Totally agree it's a great way to go.
6 wpc at 8 ohms for the 300b and 3.5w at 8 ohms when using 2A3 in my Elekit TU-8900 which has a auto detection circuit and can run either tube just plug and play. Fwiw you can also run each tube set with or without negative feedback by moving a simple jumper which makes a surprising amount of difference.
Both 300B and 2A3 drive the HE6 superbly. One of the things I really appreciate with the amp is that it's the first time I've owned a single amp that can run both hd800 and he6 headphones and speakers at a very high level of fedelity. With the Chord Dave front end finding a transparent enough amp to do justice to the Dave can be a bit of a challenge.