There are multiple things at work here, I think. The 2001s, which I own and love, can be a bit hot on top, something tubes can soften. In my case I padded down the tweeters just a smidge with a 1 ohm resistor, which solved the problem for me. Bi-amping gives you the ability to adjust the relative balance in the same way, to a much greater degree, of course. An yes, if underpowered for the room they won't open up properly.
These are great speakers sonically and in construction quality. Few speakers at any price are designed and constructed in such a cost-no-object way by such a great designer. They have the hallmarks of long term collectible classics.
These are great speakers sonically and in construction quality. Few speakers at any price are designed and constructed in such a cost-no-object way by such a great designer. They have the hallmarks of long term collectible classics.