Such systems are not for people who can't see beyond a couple of lines on the graph or blindly cling to some scoring system that is barely a guide line for how something can be heard.
It should be kept in mind with which system Mr. Linkwitz measured. I'm sure he did the best he could. Proof of his theory is that the Sound Power DI is excellent on the LXmini. The concept is excellent, and it can be shaped very well.
But it is more realistic that it will be mW. I've never seen the point of measuring at 5W. a more realistic picture is obtained when measuring at 100mW, 500mW, 1W. at 5W almost all of them work well.
Don't worry about the power of the amplifier. Any amplifier will do for that purpose. There won't be more than 1-3W. What should be taken into account when choosing an amplifier is that distortions must not increase with frequency.
Xo LR2. You can see in first post all DSP settings. Settings are change a little over time but i will publish final DSP data for all folks. THD is quite narrow, 2nd harmonic, i wound not bother with that.
Tube is made from inner tube and outer tube, between is filled with quartz sand.
Let's not go off topic. If you don't like something, feel free to open a topic. Back to the topic of this interesting video that is so requested by viewers. Lintons are wonderful to listen to.