Merry Christmas! How much difference is there between using speaker plugs and not using one? This may be psychological but I seem to notice a difference in the sound quality from the JBL N-Center II speakers after using RCA speaker plugs. Gun shots in movies sound so real and the voices more smoother and life-like. I didn't use speaker plugs until recent because I wasn't sure about keeping the center speaker. Any thoughts? Also, besides gold plated speaker plugs, is there any difference in the type of plugs used; say, an RCA speaker plugs compared to monster? Thanks in advance for your response.