Just to be clear, are your tweeters side by side or one on top of the other?
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Ok, yours are mounted horizontally and yes, it makes a difference. Your version is either the SDA 1 or the SDA 1A. One of the tweeters is an dimensional tweeter, the other is stereo. Polk found that the dimensional tweeter wasn't needed and in fact caused a phasey effect. The next and following generations had the tweeters mounted vertically and utilized a progessive point source. Some folks, with your model, disconnect the dimensional tweeter and report better results. Polk has a forum that you can find out more about your speakers, if you're interested.