hello all I am purchasing the 422/S8 package for a impending holiday home purchase (before I have no more cash flow, or WAF). For the moment I want to split them up for a Zone B reciever (Yamaha HTR5590) A/B stereo application in a somewhat open plan kitchen/great room. My dedicated home theater room sits below in an 800' sq L-shaped finished basement. I am considering using the remaining center speaker in a biwired center pair downstairs. My downstairs config is this; Yamaha RXV4600 (7x 130w) Intimus 1x 533-VAC Center, 2 x 533-PT mains, 4x 534-SS Surround Yamaha YST SW305 subwoofer (200w, 20-160 htz) 106" projection screen/Panasonic PTAE9000 Upsampling DVD player HDTV Tivo My questions; Can I (or should I) and how do I biwire these center speakers to provide a better center channel in the sound stage?Will the HD-X3 impedence help when driving these from one channel? Will the powered sub in the PT 533s reduce the load on my receiver to compensate? Is it all overkill?!! This reciever also has the option of 'presence channels' for ambient effects and a feature they call 'dialog lift' for improving center performance with large screens. Any opinions from Yamaha fans on the usefulness of presence channels? Next question's answer may cause me to use one pair of the 422s for this purpose. How do I share a sub accross A & B channels? I could use them in a sort of 4.1 satelite, A only set up and these receivers have a nice mulitchannel stereo DSP mode, but I'd like to be able to switch off the great room (baby sleeps nearest to it). Maybe I should just use one pair in the kitchen and let it spill into the great room (we don't use it as much now the basement is finished!) How important is timber matching subs with these satelites in music applications? The yamaha sub should perform better upstairs (same combined sq foot as basement, but cathedral ceiling in great room). Regards, James