Max my boy- interesting to see you quoting RV ;>) But you are correct. The difference in nomenclature is with single biwire vs. double which I believe is the same as internal vs. external or internal vs. shotgun. In my mind, shotgun=external biwire, while internal=single. Now RV says that true biwire requires two sets of cables, connected to same posts at speaker end, not even terminated together. Well, I guess I can live with that as true biwire, and I will say that in my recent upgrade, I went from an external biwire (2 spades at amp to 4 at speakers) to a "true" biwire, with 4 spades at amp (two on each binding post) to 4 at speaker (two on woofer and 2 on mid/tweets). It does sound great, but you do have to be careful about the + and - spade touching at the amp. That would be called "blown outputs" biwiring, the most expensive form.