A amplifier driving a set of speakers sees not only the impedance of the speakers that varies with frequency but also the whole circuit including the cables. Thin cables represent a resistance and impedance and thus would degrade dynamics and introduce coloration. However thick, low resistance cables would would be a transparent load for an amplifier - so the sonic difference should be IMO - zero.
WHY CABLES MATTER!
I have seen the argument over and over again on why cables matter and the that wire is just wire and how scientifically it’s impossible for them to make a difference. The thing that surprises me the most is that different materials are used. Different shielding is used. Different connectors are used. Different braiding methods of the cables are used. Materials are sourced from different manufacturers and put through different creative processes but I always get some guy who comes on and says. WIRE IS WIRE AND YOU ARE NOT HEARING WHAT YOU ARE HEARING? To me it’s pure arrogance to think you know more than everybody else to the point where you tell me what we are hearing through my ears and we are not smart enough to know when are minds are playing trick on us. But using all these different materials, process and shielding and creative processes don’t make a difference. I spent the last 15 years trying all the cables I could try. Thoughts anyone?