It depends, which is the annoying thing about cables. Do they make life-changing differences, probably not, but musically significant, can do. If I have spent tens of thousands on a top system then using thin cheap copper cables is totally wrong. If you have a less expensive system then using Nordost Odin II throughout is also wrong. But using cheap cables does not mean that cables sound worse. For example, Gothic Audio pure silver cables are not expensive and it takes a far, far better (expensive ?) cable to sound significantly better. Same for Puritan mains cables.
Most cable companies will allow you to listen at home (Distance Selling Regs) and if within 14 days they do nothing, or not enough, send them back and that's it. Why all the hectoring when it is easy enough to try yourself?