Well, no.....
The SWS8 supports 8 connections. A connection could be one tuner (a receiver), two tuners ( a DVR), five tuners (a Genie) or no tuners (a Genie client, a Power Inserter, a Cinema Connection kit). To put it another way, if you have a Genie, a DVR and one receiver, that's eight tuners but only takes three connections on a splitter so an SWS4 is enough, you don't need an SWS8.