I'm currently using both Mundorf's 1.5mm Silver/gold solid-core round wire(teflon insulated) + DIY Mundorf 2.1sqmm copper foils run parallel in single-wire configuration with my waveguide-based Auto-tech Mummy MkII speakers - and it works brilliantly, also better than each wire run individually. The sound with the parallel run of (different) wires, compared to the Silver/gold wires alone, is more focused and vital, sharper, and with a more natural tone and timbre.
A very cheap tweak, I might add, being that my existing wires were the Silver/gold's; a Mundorf CFC14 coil costs a mere $60, with plenty of copper foil for many many feet of speaker cable...
A very cheap tweak, I might add, being that my existing wires were the Silver/gold's; a Mundorf CFC14 coil costs a mere $60, with plenty of copper foil for many many feet of speaker cable...