What a wonderful room you have their Laurie, the scenery is like a picture from Better Homes and Gardens. I would also echo Jacks recommendation of trying to angle the Center speaker downward a bit if possible. Idealy, you really want the center and left/right tweeters inline, however, it appears you have no way to lower the center with your entertainment center. So, the next best option would be to direct the sound towards you.

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