solid state vs tubes

I was going to tell an inside story about the Manley TNT when this thread started as a another tube/SS debate but that was not the OP's intent. Not supposed to know that anyhow.

Don't know if the tube amps I've known have been rolled off on upper frequencies or the better SS amps have been too "hot" but I tend toward the former. Consider that the higher frequency harshness that you're sensing may not be frequency related as much as time related, as if that helps. Different animal, different habitat.

As far as the Plinius, it does have the switch to run in A/B when not used or for casual listening. The "laid-back" soundstage might be a big adjustment from vintage tubes or, for that matter, vintage SS. Guaranteed it's a better match for the 1.6's than the old VTL 120.

MrTennis,
As a long time Magnepan guy, part of your issue with the 1.6s may be more setup than the speaker itself.
At one point I was tweaking the toe every couple days. Bad image here or too bright or whatever.
Finally, in reading around, I found out that Magnepan SWAPPED SIDES on me in the mid-90s. Yep, you are probably listening to the mylar side, with the connection plate and fuse in BACK where you can't see it. You may even have the tweeters out. I think that's what the 'book' calls for. My MG-1s were mylar back and it never occurred to me that Magnepan changed that......My 1.6s now remind me of my old speakers, but MORE in every way....if that makes sense?
Well, ForGet It.
Just rotate your panels IN PLACE. Put the pole piece facing you, the listener and the tweeters 'in'.
My brightness disappeared due to my now crossing the speakers axis behind my sitting position. I couldn't do this before without some funny (not funny, really) image artifacts or even a 'hole' in the center. Now, I have a much better image, no comb effects, smoother HF response, the resistors which I had on the table threatening to install are now put away and the sweet spot is MUCH wider.

Try it and get back to me.....pm if ya' gotta.

when i use my vtl amp on the magggies the treble and upper mids are well behaved. so, i conclude that it may be clipping issues or the solid state transistoritis in the treble when mated with panels, when playing loud, for me over 85 db is loud.

I think you are hearing the way the impedance of the speakers is acting when being driven by tube amplification
vs solid state power;it just so happens you are hearing it in the treble frequency range;its all part of matching the proper amps with the speakers in my opinion.