Not recommended....You could give it just enough toe in and adjust speaker-speaker distance to obtain some sense of holographia and a enveloping soundfield.
The older klipsches, by default, have some major flaws....the glare, shout and a lot of pestilent things historically associated with them come from the inability to set accurate driver delays, etc, w.r.t acoustic center on a passive crossover. You may start to aggravate some of this. With an active crossover, you can make even the old klipsches a very serious hifi speaker, same goes for the old altecs, jbls, whatever...essentially all the big horns.
The main klipsch engineer himself has resorted to active crossovers on the newer klipsches...that should tell you something...you wouldn’t know more about the la scala than him, would you? If you heard goofy bass from the new la scala...it implies you sat in a goofy room and the room messed up the bass or whatever.
All these big hifi horns should be treated like the installation grade pro speakers....dsp, clean crossover, driver delays and the right amount of peq to taste....There’s a reason big horns have some haters...its because of purists sitting around with inadequate tools..and to be fair, the haters heard all the flaws, the purists managed to glaze over it or did some psychological convincing...
(not to mention the flea watt SET fantasy with some guys because the speaker is soooo sensitive n all...the SET is a very stupid amp to tie to these type of klipsches and horns, but, that’s a different topic)