Because the input impedance is so high (~100K ohms) the cable is really just responsible for a voltage reference. That along with the fact that it is only used down deep in the bass (below 80hz) will help to minimize the sonic contribution of the cable used.
Still, that doesn't mean that there won't be any sonic changes with different cables. I would recommend trying something solid core as an upgrade to the stock stranded wire supplied from REL. It doesn't need to be a large gauge given that there is no real current involved. Silver plated copper solid conductors might be interesting as I have found them to result in tighter bass.
Still, that doesn't mean that there won't be any sonic changes with different cables. I would recommend trying something solid core as an upgrade to the stock stranded wire supplied from REL. It doesn't need to be a large gauge given that there is no real current involved. Silver plated copper solid conductors might be interesting as I have found them to result in tighter bass.