LOLOL! I didn't say "dark" or "closed-in" at all. I certainly hope I didn't give anyone that impression. To clarify: I meant just a little bit rolled-off / smooth - that is in a non-solid state, grating your ears / grainy treble sort of way. If it wasn't this way, the PS1000s would have been unlistenable - and I felt the Lyr, as it was with the stock tubes, were awesome with the PS1000s.
Did I perceive the Lyr had the best most extended articulate treble compared to other more expensive tube/hybrid amps with "decent" tubes? No. Though, IMO the JJs are a dull sounding tube - so there's only room for improvement on that.
I do want add that there was absolutely zero wierdness up and down the frequency band - no hardness, glare, nasal sounding, etc.