I read an article once about biwiring..
Essentially aside from a minor change in impedance by having two low-resistance connectors in parallel there any isolation introduced by biwiring?
The article raised an good point - 'electrons do not readily separate into those participating in high and low frequency signals because this is the choice of paths for them'.
So why biwire? In your collective experiance does it make any perceptible difference?
Let's try and make this easier to understand.
1. The speaker terminal/s on the back of an amplifier are, for a typical modern solid state design, essentially considered a "constant voltage source". That means that the audio voltage present is unaffected by the varying load or impedance of the speaker.
Remember, the impedance of a speaker varies enourmously depending on the frequency. This means that the speaker "draws" more current at specific parts of its frequency range than others. The impedance could vary from as low as 3 ohms to as high as 30 ohms over the audio band.
It is the bass driver that exibits the highest current draw (and presents the lowest impedance)
Familiar with ohms law ?
Your speaker lead has an essentially constant resistance at all audio frequencies and beyond.
Your speaker leads "lose" or "drop" some voltage across their length as speaker current flows. The important point is that this voltage drop is not linear because the speaker presents a varying "load" or "impedance" depending on the frequency.
This means that the voltage at the speaker terminals is not a true image of what appears at the amplifier output.
To make this easier to understand imagine a test CD with a frequency sweep from 20 to 20khz and that the amplifier volume control is turned to give say 10 volts rms at the amp output. If the speaker were "just a resistance" of say 8 ohms then the voltage at the speaker would be 10 volts less the voltage lost across the leads due to their resistance. The voltage at the speaker might therefore be only 9 volts but it would be constant with frequency. The only audible effect would be a theoretical reduction in sound level. A real speaker though is anything but a constant resistance, it is a resistance that varies with frequency. So the measured voltage at the speaker now varies depending on frequency of the applied signal and consequent current drawn. That modifies the sound from the speaker. The output of the speaker now depends on frequency to some extent. The big question is whether that is audible or objectionable. For long leads of high resistance (thin wire) it may well be. For short runs of thick cable probably not.
Bi wiring splits the HF and LF signal feeds such that the bass driver of the speaker still draws its large and varying current but now the hf and mid drivers (which draw far far less current) are fed via a separate feed from our "essentially constant voltage" source... our amplifier. So now the critical hf and mid drivers see the accurate voltage present at the amplifier terminals, while the bass driver (which from an audible view is considered less critical) gets a more distorted voltage due to it altering or "modulating" it's own drive voltage.
It is for you by listening to determine whether the change to bi wiring results in a different or better or worse sound.