I have the JLs and the CR1 and no experience with SVS. The Fathoms have the features to setup a good frequency response in the room. The CR1 can help more with frequency transition to the main speakers and eliminating the vertical axial mode problem, if needed. The controls are covered by the grill and the automated DARO feature comes with a proprietary microphone. This setup does not lend itself to frequent user adjustments like probably an app does. I do not know the real value of the SVS app, though. If you get two, DARO works properly when the subs are daisy-chained, as in mono. DARO is band limited. The ELF filter is handy but I still have a lot of bass at 20Hz with it set to -12. I do not know what performance means, but I think it is important to have a sub that that is honestly as good as the main speakers' woofers in order to not be disappointed.