Can a McIntosh MC7205 handle Polk Audio RTi A9’s?

Your getting the idea.. See what sounds the best, and hopefully, not have to add a passive preamp (29-79.00). The less in the sound path the better, especially the mids and highs.

It would be better if you had bass control, over control of the highs. TOO much amp is better than not enough. BUT SQ is gonna be good with either amp. The leftover channel could run a passive sub, or center. I’m not a center speaker guy, so if needed a, passive bass bin.

Regards

Yes just watch out for that combined channel power it can be a lot more then you think because of the way the speakers are hooked up the amp might see a lower ohm, most Mac amps are not going to be affected by this in the least bit but your speakers will and if they are rated around 100w or less you could overdrive them at higher volume levels.

The only speakers I want biamped are the 2 RTiA9s. They are rated at 500w each. 

500W peak.
be careful.

 know the sound of straining, popping voice coils, treble slurred with midrange.

   I learned the hard Way, all those years ago.
enjoy