Yes. But IME, this is not the way to go. I’ve found this setting to “muddy” up my bass. Also, since the towers are playing full range signals it takes a LOT more power and your AVR might complain. By setting to small with an XO of say 60hz, your AVR’s load will be reduced, and you’ll have more headroom and unclipped power. The ultra towers are probably all done by about 28-30hz so there isn’t much point in sending them full range signals. IMO, towers, like yours are still suited very well at delivering great dynamics above the XO than bookshelf speakers of the same line so I would set them to small and find an XO that works.