All Cables make a big difference, Power, Interconnect & Speaker Cables. There is also the very important matter of Cable Synergy. I have enough Components for 6 Systems, although only 3 Set-Up currently. Some Cables mate beautifully between some Components but not as well between others. Was just swapping out some different Cables for Bass & Mids/High's in one of my Set-up's whe I read this post, the differences are easily heard.