These are a massive PITA to make, but entirely worth it for efficient widebanders. They will also work very well with efficient horn systems, but should not be used for inefficient speakers. They just don't have that much area.

Not quite as much of a PITA to make, these can be seen as an upgraded version of the Hathor cables. They are also tinned copper, but in natural cotton instead of XLPO insulation and they are thick, yet surprisingly flexible. 25mm² (3AWG equiv) area!