It all comes down to IQ level of the engineer...
If it's a high IQ engineer behind the speakers, for example,
Andrew Jones
Michael Borresen
Shinji Tarutani et al
Yoshiyuki Kaku
Greg Timbers
Peter Comeau
Masahiro Tobise
Akira Nakamura,
etc
you can buy it without hearing it...if these kinda guys were given a enough of a budget to work with it.
On the other hand, If a low IQ dude is designing your speakers...yeah, it's imperative that you hear it and decide if you wanna run away (as fast as you can) or not...In general, you can throw all kinds of cash on a low IQ engineer and he'll still come up with crap because cash never created aptitude/brain cells.