As I type this I have two SVS 25-31 CS+'s going into a Sampson 1000 amp. Now I want to buy two more SVS PCI 25-31's since they have the same driver as the CS+'s. The problem I think I'm going to have is connected them and this is where you come in. Exactly how can I do this? Is there a 3 female to one male cable so I can plug all 3 outgoing sub cable's(2 from the PCI's, 1 from the CS+'s) into my Denon 3805? I figure this upgrade would benefit me more then going with two higher models. Less expensive. The bass should be twice as loud because I'm doubling the power and drivers correct? I want the earth to move. What exactly happened to the B4? Is it still offered?