After your thread you started where one of your lenses fell off and was resting against the woof I decided I better pull the grills off and check mine. Anyway mine were still on the horns but decided to experiment a bit with removing the lenses and playing them that way.
Interestingly enough I have kept them off since, noticing (what I perceive) as an improvement in imaging. Not the only change, also a bit more of the "in your face" directness. Also seems to be a bit more revealing (i have decided ).
The mids are a little more bright, and I'm definitely going to get REW running some sweeps soon and see if I can see and possibly flatten that portion out, but in the meantime, since I never listen off axis anyway I am very much eenjoying the new image from ditching the lenses.
I did try that for like 5 minutes! Too bright for my ears! Lens' back on.
I have the setting set to -6db which for me is just right. I need to hook them up to some different amp/preamps and see how the sound is affected. The Onkyo may be voiced a bit brighter than the JVC gear, we'll see.