They have large woofers. BFD! They're too large for the cabinet. That along with an excess of drivers places them squarely in the "Kabuki" category.
Yes, they'll play loud with very little power but have no deep bass. If you like lots of upper bass and a very forward upper midrange, they're your cup of tea.
OTOH: We are in agreement about listening to speakers prior to buying.
Oh, kabuki for sure. But among the so called kabuki speakers, some are better than others, and those biggest late 70s Sansui models are the ones which to me can sound like music, given a good source, lots of power, and appropriate program material.
For example at a live jazz show, saxophone does not sound smooth, it can sound shrill or even blaring. And a 6" driver will never have the impact a drum kit makes. Similarly, those big Sansuis can make all of the walls in your listening room vibrate with a bass guitar note. Yes the deep bass is sacrificed in exchange for these dynamics, but every speaker out there does hold some form of compromise.
Now I realize this isn't everyone's cup of tea. It isn't my cup of tea all the time either, and truth be told, my EPOS and Tannoy speakers are much better than my Sansuis 80% of the time. But that 20% of the time when I've recently come home from a live show, and I want to hear similar dynamics, I just love playing the big Sansuis.
I'm not even a big fan of Sansui amps, I use mine with ARC or Naim amps. It's just my way of having some fun. It's kind of a similar sound to those old 50s paper cone drivers, except the Sansuis have aluminum voice coil formers and better glues, and are a lot less easily damaged by excessive application of power!