I would be placing the M60's on each side of my TV, which would be around 41/2 feet apart. The mains would be around 12 feet apart, which is how the mains are now.
As for the amp, I just assumed I would need it! I'd be very happy to not have to purchase it, if you say it isnt necessary. How many watts would the m60's(as dual centers) be getting from my V2600(130Wx7)? Would it be sufficient? If it is I would be glad to hold off on that purchase. I just don't want to be skimping on the center channels.
