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I would imagine the problem would be with the speaker's crossover network. Give Polk's Customer Service a call at 1-800-377-7655 extension 208. That is Kim Jasper, he will be able to help.
I recently purchased a set of RT1000P's used. One of the speakers seems to have the subwoofer volume stuck wide open. Also the tweeter was shot, so I substituted one from my pair of RT800i's which I thought had the exact same model number tweeter. The volume from that tweeter is extremely low. Any ideas on what the problem might be?
Also I ordered a pair of new tweeters for these towers since the one was shot. The model number was SL6507 and the speakers had model number SL6506 in them. Will this new model work as an adequate replacement?
Thanks for your time!