I have my mains and center channel bi-wired.
The 2200's are driving the mains and the 7500 is driving the center channel and all of the surrounds. I have it set up this way so when I am listening to two channel music the 7500 is not being used. Can I ask why you would use the 7500 for outdoors speakers? It seems that an amp of this quality should be used for your home theater system and use a smaller less expensive amp for the outdoor speakers. I bought an Audio Source AMP100, 50W per channel, for my deck speakers but haven't hooked it up yet. This was like $90.00 with the shipping. I am going to use zone two for the deck.