Klipsch Forte ii too bright, or is it my room ?


Help? Certain music makes my ears hurt from my bright sounding Klipsh Forte ii's (Sonny Rollins Saxophone Colossus), Or is it my room full of glass and tile? Or am I listening too loud (80 db), or my 1970's Pioneer receiver? I just ordered some dynamat to put on the rear of the horns. Some music is good though. I have often though about getting another pair of speakers so I can switch back and forth or run all four depending on the music. Any advise?
peterjc
Wow thanks everyone!! Out of 20 comments it looks like the large amount of glass needs curtains, that is inexpensive & easy, I'll do that & the dynamat first, if It's still too bright a tube amp / new pair of speakers will be in the distant future as I have other expensive hobbies like having a mortgage in California, thanks again everyone!
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Klipsch for starters are severely bright. Then an older receiver 
the tile will bounce highs all over

 tape some cheese cloth or cut a tshirt the size of the tweeter, tape it over the tweeter, or try a 2nd layer of tshirt over the tweeter, let us know the results, it will soak up the searing highs. An inexpensive fix!
This worked for me on my BIC towers. 
    
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Klipsch for starters are severely bright.

Conventional "wisdom", but maybe not so wise.

You can make Klipsch loudspeakers bright if you are careless. You can also make them rich and tonally accurate if you pay attention to the details. Many people don't, hence the reputation.