My preamps and amps are all balanced differential. I am using 30AWG pure silver solid wire with extruded Teflon sheath, 3 of these wires braided, left unshielded and terminated with Lemo connectors. I have installed Lemo sockets in all my equipment. I measured the capacitance and inductance of all the cables to make sure they are optimal for the equipment being connected. For speaker cables, I use 3mm wide pure silver foil with Teflon tape insulation. For the bass amp, just regular large gauge speaker cables for the high current requirement. I have tried different commercial cables over the years, but this combination is by far the best. Since I am using a three-way active crossover and requires a lot of cables, expensive commercial cables is out of the question. The total cost of materials for the cables of my system was around US$300 fifteen years ago, which might be around $450 today.