rotel - kef - q acoustics

My current system: Rotel RA1062 Amp - purchased 2006 Rotel RCD 1072 CD Player - purchased 2006 KEF Q500 Speakers - purchased 2017 QED XT25 - Speaker cable QED Qunex 4s interconnects - purchased 2006 Chord Banana Plugs I have recently noticed a difference in sound coming from each speaker. One...