Thanks everyone for the responses.
Have you tried turning the EQ to Natural? It should tone down the highs some. Polks are considered bright by some and sound great with this receiver to my ears in my setup.
Yeah it helps somewhat but I still hear some slight shrillness.
As you are on a budget look first for replacing your fronts first.
Thanks, good idea. I'd love to replace the center along with the fronts initially.
What is your budget? How big is the room? These two things will help others to give you good advice.
At the moment my budget isn't too large, around $300-500 total. I'm not sure if that is enough without saving up more to get some good speakers (at least fronts and center). My room is roughly 15' length by 12' wide by 7' tall.
I suspect the problem is more with your speakers than with the (any) AVR. PSB and Paradigm are both great speakers and a good place to start. I happen to use NHT with my Yamaha and "shrillness" is not something I enjoy.
Try looking on the used market for some decent speakers. These receivers have a very detailed sound to them and mine shines with the ML Electrostats. As you are on a budget look first for replacing your fronts first.
Kefs work well with this receiver and you could find some decent ones used. Others here will have some great offerings and ideas as well. Best of luck in this.
I'd like to suggest Monitor Audio. I have the current Bronze series (BX), and I'm very satisfied. If you can find some to audition, give them a try.
So it sounds like NHT, Paradigm, Polk PSB, Kefs, ML, and Monitor Audio are some good ones to try. I'd sure like to find some with good return policies in case I still hear the shrillness. I've found some of these brands one Ebay but usually the sellers don't want to ship so it's local pickup only.
At the moment I've gone to rather extreme measures and disabled the tweeters in my fronts and center channel which removes the shrillness but of course doesn't sound great. One other thought, would upgrading the caps in the crossovers make a very big difference, i.e. replacing the electrolytics with metallized polypropolene? Thanks