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Defective would be my first guess. Not to be condescending but, even if you had the phase (polarity / black to black and red to red) wrong, they would still work but would not sound right. Most newer/better receivers have setup assistants built in so you have to tell the receiver how many speakers you have and they will show you which binding posts on the back of the receivers the speaker wires/cables go to. Since you tried 3 different receivers that probably isn't the problem. If you are connecting bare wire to the speakers, I have seen people slide the wire so far through the binding posts that they are tightening the post down around the wire's insulation which would block the electrons' signal through the wire. I used to use bare wire but banana plugs or spades are so much easier. On the funny side, I saw a friend hook up his new speakers and told me they didn't work. He unknowingly had the mute on which blocked all sound and he was slightly embarrassed when I hit the button and the sound came out. LOL
Sorry, there was a problem. Please try again later.Try a multimeter check for continuity??
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