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B&K Sonata M200 + Polk Rti A9’s

I came across a pair of the B&K Sonata M200 mono blocks for $450 (Canadian). 
I currently have a pair of the Polk Rti A9’s hooked up directly to an AVR (Onkyo 818)
i was wondering if anyone has had any experience with these amps and these speakers and can chime in. I know thes speakers are very power hungry and I just don’t know if these amps will be enough. I’ve been holding out for an Emotiva XPA-DR2 which puts out 550wpc. Should I keep holding?
rafa1478

Showing 2 responses by rafa1478

rafa1478 OP
2 posts
 
thanks  for your reply LoomisJohnson. 
  What kind of difference can I expect to hear,  Will it really be that much? I know my receiver is just a receiver but as I understand it’s a pretty beefy one , no?

rafa1478 OP
2 posts
 
Thank you everyone for the input but the sad outcome was that when I went to listen to them, there was a lot of hum in the background and I was afraid to take them since I don’t really know much about the issue. I offered to still buy them under the condition that I could try them at my house with my cables and speakers, and if that same humming was there, he’d take them back, he refused so I reluctantly passed.
now he’s offering me a Bryston 4B, which I know nothing about. 
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