The Voxativ drivers are wideband drivers - single point source. Absolutely glorious. I have a 5" AF-2.6 in DIY cabinets supplemented by a Rel S/5 SHO and its all I need in a nearfield setting (I sit about 7-8' from the speakers). The Voxativ sound is another word for transparency. As you move up to the 8" drivers you get more low end ...but I think the sub-bass of the Rel, while perhaps not as super fast as the units on the 9.87, does a great job.