I have Athena audition series speakers with a yahama htr 5960. My system sounds great for movies, but during intense movie action the speakers sound harsh. After a while my ears get irritated. I have been blaming the speakers all this time, but I think the problem is my room. For the last couple of days I have been reading about acoustic treatments and I think this may solve my bright room. I have leather couches, left wall is concrete blocks, nest to my left front speaker is a hardwood door, and lots of wood trimming. I want to know how much of a difference acoustic panels make and where to place them.
That's a classic recipe for bright sound! The Athena's are on the 'lively' side as it is, and pairing them with the Yamaha in a very live room will definately sound a bit tipped up. Bpape from GIK can definately offer you more expert advice than I can, but as a general rule placing room treatments in the corners and at first reflection points is a good place to start.
A few companies that sell acoustic treatments at reasonable prices (that can also offer expertise in how to use them):
RealTraps - Ethan drops by AH from time to time.
GIK Acoustics - Nice panels, a bit cheaper than most, too.
Eighth Nerve - I've got a bunch of 8th Nerve stuff and for the size it's pretty amazing; no small treatments should work that well!
ATS Acoustics - It would be hard to even make your own for the price of the panels from ATS! Nice assortment of colors as well.
Treating your room will absolutely make an enormous difference! I have said it before but it bears repeating: acoustic treatments will give you more improvement for the money than any other upgrades you can make, including better speakers. Putting expensive speakers in an untreated room is like using 1/2 a can of Right Guard instead of taking a shower- it might solve the problem but it's not ideal.