Jeff, Belden 5000UP is a stranded bare copper cable - the worse to use in my opinion. According to Audioquest thick cables produce skin effect that changes impedance of the cable with frequency. Skin effect starts at gauge 18 (@20kHz). In stranded cable current jumps from strand to strand to stay on the outside (skin effect) crossing surface of each strand where copper oxides are. Splitting cable into insulated strands will be the better choice but when strands are in magnetic field of each other skin effect is still the problem. For that reason cable companies use flat tape, flat wound wire or hellical twist on oversized hollow tube. Flat tape is thin defeating skin effect. Flat wound strands are only in magnetic field of neighboring strands. Twisting each wire with with GND (return) wire also reduces inductance. Hellical twist on oversized hollow tube is pretty much the same in different form factor.
I'm not sure if skin effect is audible, especially since tweeter's impedance goes up at high frequencies, but cable companies engineers know more on the subject while different manufacturers use exotic configuration to achieve the same.
Mixing thinner and thicker wires is often done in biwired cables (Audioquest), but thinner wires also have higher inductance. My Acoustic Zen Satori Shotgun have separate cables for Woofer and Midrange/Tweeter - both gauge 10. Hellical twist on hollow tube makes them almost an inch thick. Insulation of the cable is Teflon to reduce dielectric absorption. It uses 6N zero crystal copper.
Biwiring supposed to reduce effect of EMF from one speaker to another that still exists in spite of crossover filters. Some speakers show great improvement with biwiring while others show none.
I'm not sure if skin effect is audible, especially since tweeter's impedance goes up at high frequencies, but cable companies engineers know more on the subject while different manufacturers use exotic configuration to achieve the same.
Mixing thinner and thicker wires is often done in biwired cables (Audioquest), but thinner wires also have higher inductance. My Acoustic Zen Satori Shotgun have separate cables for Woofer and Midrange/Tweeter - both gauge 10. Hellical twist on hollow tube makes them almost an inch thick. Insulation of the cable is Teflon to reduce dielectric absorption. It uses 6N zero crystal copper.
Biwiring supposed to reduce effect of EMF from one speaker to another that still exists in spite of crossover filters. Some speakers show great improvement with biwiring while others show none.