Nae, welcome. The only thing wrong with your question is that you should have identified the speakers. If you have speakers with two sets of terminals the bottom set is connected only to the woofer and the top set to the mids and/or tweeters. There should be a metal strap included which connects the two sets of terminals and has to be tight so that all the drivers are actually operating. Otherwise, the bottom connection will only operate the woofers and you'll get little mids and no highs.

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Enjoy the music, not the equipment.