So, I'm upgrading my mains from Polk Monitor 70's to Polk Rti12's since they were massively discounted on Newegg's ebay store. After a bit of looking around it seems to be the consensus that I'm going to need an amp to really get use out of the new speakers, which isn't a big deal. After a bit more searching it seems that the crown xls 2500 would be a good match. So my question is how the hell do I connect it to the receiver? This seems like it should be a simple question but after a good bit of googling without any real answer I figured I'd see if anyone had suggestions. Could is be as simple as connecting the audio out to the amp via rca? Obviously the receiver isn't going to last much longer because sooner or later I'm going to need to replace the monitor 70's I have setup as surrounds and whatever takes their place will probably need another amp which this doesn't support but I'd rather not turn a $440 speaker purchase into a ~$2000 speaker/amp/receiver purchase - at least not all at once if I can help it.
receiver:
http://ecx.images-amazon.com/images/I/916BXSgY+eL._SL1500_.jpg
amp:
http://ecx.images-amazon.com/images/I/61924l2NWiL._SL1200_.jpg
receiver:
http://ecx.images-amazon.com/images/I/916BXSgY+eL._SL1500_.jpg
amp:
http://ecx.images-amazon.com/images/I/61924l2NWiL._SL1200_.jpg