After listening to them I went with the JBL PB10 sub but got a couple questions since I got the floor model, and got no manual. 1. There is a switch for LFE or normal which one do I want? (will be using this with surround speakers BTW) 2. Another switch with phase which can be either 0 or 180 which do I want? 3. Crossover frequency dial which can go from 50hz-150hz 4. Also anyone with this sub know what I would use to plug it to the reciever? It says for LFE use L or R, and in that case would I use input or output? With this sub I will be using the energy C-1 bookshelves with the corresponding center channel.