Speaker cable recommendations with Magnepan .7s

lak opened the door so I'll chime in with my experience. I recently bought a pair of MMGs which is in a room adjacent to the rest of my system which consists of two separate (and different) amps being fed by a single preamp. The "other" amp is running a pair of MLs in that room. The MMGs are connected to my amp via a pair of 20' solid copper 12 awg wire - certified for in-wall use, run through my basement and bought from Home Depot. Before doing this, I hooked them up to the amp using the wires I use for the MLs which are older but good quality 8' MIT cables. Aside from differences due to the room, I honestly can't say if the long wires hurt the sound. I think they sound great as long as a low gauge/thick cable is used. This is of course not a scientific A/B comparison so YMMV, for sure.