not to be the turd in the punchbowl, admittedly having never heard anything by JTR, but I have read the word "dynamic" 100 times in this thread and it got me thinking after I read the spec sheet on some of these loudspeakers.
Of course they are "dynamic" (for their range, anyways)! They implement large (or in the case of the 12's, VERY large) cones and play nothing below 80-90hz!
I'm no engineer, but when you relieve a loudspeaker of the duties of reproducing a massive portion of the sound spectrum (specifically in this case, nearly the entire low-end), it will afford it the opportunity to (in the JTR's case especially) DESTROY the balance of it. I mean the idea of multiple 12 inch drivers operating at 80 or 90hz and ABOVE is nearly unheard of, correct...that is in all but speakers in the most cavernous (read: theaters) venues?
In the end, without even hearing them, I would imagine that these speakers would be absolute overkill in 9 out of 10 HT's. Now, that said, I understand that these are not produced for ordinary HT's to begin with.
Simply, not to say that they even compare overall with the rockets, but, on the other hand, the rockets are attempting to be "near" full range speakers (prolly to around 30hz or so?) while the JTR's seem like bookshelves on steroids that will still require a couple thousand (or more?) more on a subwoofer to provide a bottom end.
Not to say that the rockets provide sub-woofer like bass, but what kind of speaker could they produce for 12-$1300 if it only had to play 90hz and above? I'd bet it'd be pretty "dynamic" too.
Honestly, I was taken aback a bit by the idea that even though these are tuned to 80hz, that they still are being described as heroically "dynamic".
How can any speaker that cannot produce the lower third of a cello be described as truly dynamic? Honest question.
EDIT: after reading a bit further, it seems the 12 ht's will go all the way down to 50hz...at $3600 a pair!