Good day from The Netherlands! There might be a lot to say about this topic. As with many topics in audio. And many opinions as well. I can only speak from what I hear when I sit back and listen. I have not much technical knowledge.
About single- and bi-wiring, there is something strange going on. When I connect my speakers in a bi-wire configuration, which is quite easy with Audio Quest Rocket 11 speakerwire, for there are four wires already put in, I definitely hear a bettering of the total soundpicture compared to single wire with good quality bridges. There is more 'depth' , more detail.
If this is 'true' or 'not true' is not important, this is what I hear.
But when i think about this, my brain (or my ears) deceive me. Because bi-wiring is fake. Eh, it is fake when using one amplifier with two terminals (left and right). Why, well, I'll try to explain. An amplifier can not think. Neighter can a cable. An amplifier just gushes all the signals it receives from the source connected to it into the loudspeaker wire. So, highs and lows mixed together. The division between these is not a matter of the amplifier, but of the filters in the loudspeaker. So, the division between 'high' and 'low' signals doesn't start at the beginning of the cable (where it leaves the amplifier), but at the end, there where it enters the loudspeaker. It is the filter that decides which signal to go where. If this might not be true, where do we install filters in loudspeakers for? Using a bi-wire configuration "passes by" the filters, and (merely) "eliminates" them, by suggesting that the filtering already occurs in the cable. This is nonsense, for a cable is just a transporter.
But the strange thing is that I definitely hear a (noticable) augmentation of the overall sound quality in a bi-wire configuration.
Please note: I am talking about a one-amp situation. With two amps (one for the highs and one for the lows), it is different.
Please correct me if I am wrong.
Good day.
Ary