I visited the SVS booth at the CES and listened to the Ultra Evolution Pinnacle. Each tower has two vented compartments each containing two 8" drivers, for a total of four compartments containing a total of eight drivers. I didn't attempt to distinguish the tuning frequency of the vent although I'm curious. My informal listening impression was "excellent bass". The imaging was smeared (there was no "holographic" pretense, or as Siegfried Linkwitz might remark, there was no "headphones at a distance"). The voicing was too "warm" in exchange for "analytical". Although the low end was enormously satisfying, I would not have these in my listening room. I'm sure there is a time alignment issue that could be addressed by active crossover and careful tuning, but the physical layout might present time alignment challenges impossible to overcome with signal processing.
I am confident the SVS engineers prioritized the consumer's expectations for home theater (especially since their booth was configured specifically to emphasize the home theater application) and not the esoteric hi-fi enthusiast listening room. Home theater has a center-channel speaker and surround speakers that would overwhelm the minor smeared imaging problems of listening to the right and left stereo channels in isolation.
For home theater applications, these loudspeakers would be fantastic. For hi-fi purists applications, not so much. Since I'm not a movie buff, nor do I have a movie watching room that could accomidate these speakers (I only have one modestly-sized television in the whole house), these are not for me.