It seems extremely unlikely that the VSX-521 would be appropriate for those speakers.
That VSX-521 receiver is rated for 110w/channel with 2 channels driven, which might seem to be enough power for the front 2 speakers. That power rating is VERY misleading, however.
The problem is that when you look at reviews and actual power tests that Home Theater has run in the past on receivers in this very low price category, it turns out that with all 5 channels driven they will only put out 30 to 50 watts before distortion exceeds 1% (if that...).
That receiver probably has only about 250 watts TOTAL available to run all of the speakers, so divide it up among 5 channels...do the math.
When listening to movie sound tracks, the loud peaks will take that much peak power, so you probably will have a lot more distortion than you want to hear.
Denon receivers have shown in past Home Theater magazine tests that they will come much closer to delivering some actual power to 5 channels
that is closer to their 2-channel power rating than most other brands. This is easy to verify by reading their reviews which have test results on the actual power.
Denon typically delivers 80% to 90% of their 2-channel power rating to all 5 channels, where other brands frequently deliver less than 50%.The Denon AVR-3311CI would be a good choice for your speakers.
It is rated for 125 watts per channel, and past test results would indicate that it can probably deliver AT LEAST 90 watts per channel with low distortion with 5 channels fully driven, which will do a much better job with your speakers.
This receiver sells for around $800, which seems reasonable for speakers which would seem to sell for twice that much.
The Denon AVR-2311CI is a bit less expensive and would also be suitable.
Originally Posted by Mugenstylus1
Here are the speakers I have
Front - Polk Audio A9's
Center - Polk Audio CSi A6
Rear - Polk Audio Rt/i A6's
I don't have a sub yet.
I was thinking about getting the Pioneer vsx-521-k
It's about 125w per channel. Should I get a different receiver or will I be good with this?