Why do you think Bi-Wiring improves the sound ?

     Despite the fact that I have always thought bi-wiring is hokum, I am offering info from Vandersteen; however, the company does point out that the only advantage is from getting the magnetic field generated in the the woofer wires away from the mid/tweet wires, due to resistance differences. i.e. it can only work if you separate the wires from each other:   "The crossovers in Vandersteen bi-wirable speakers are engineered with completely separate high-pass and low-pass sections. The bass inputs pass low-frequencies to the woofers, but become more and more resistive at higher frequencies. The treble inputs pass high-frequencies to the midrange and tweeter, but become more and more resistive at low-frequencies. The output from the amplifier always takes the path of least resistance so deep bass frequencies go to the bass input (Low impedance at low-frequencies) rather than to the treble inputs (High impedance at low frequencies). For the same reason, treble frequencies go to the treble input (Low impedance at high-frequencies) rather than to the bass inputs (High impedance at high-frequencies). At the actual crossover frequency, the output from the amplifier would be divided equally between the two inputs as they would both have the same impedance at that frequency. Because of the different reflected impedances of the cables, the crossover between the woofer and midrange actually occurs at the wire ends where they connect to the amplifier."     Caveat Emptor.
  

For those of you who state that you use both sets of speakers posts, because the speaker was designed for bi-wiring:  NO IT WAS NOT!  It was desigined for bi-amping.  Bi-amping separates the current going to the woofers, and to the mid/tweeets.  Bi-ampig does not.  However, See my post from Vandersteen for resistive effects from woofer impedence.  i would like opinions on this, because it makes sense to me, despite my Hokum Meter.

Maybe getting higher quality jumpers rather than using the typically crappy factory ones would be a factor too. 

RE: Whip-Shaw's post quoting Vandersteen.  If you bi-wire doesn't the wire carrying the signal to the bass driver carry the FULL range of the frequency to the bass driver but the treble frequencies are filtered out by the crossover before it gets to the driver?

And doesn't the wire coming from the amp to the tweeter carry the FULL range of frequencies to the crossover and then the low frequencies get filtered out before it gets to the tweeter?    

I do not think bi-wiring or even bi-amping eliminates the crossover does it? It simply directs the signal to different sections of the crossover. One goes to the low pass filter, the other to the high pass filter.  The full frequency of the signal is delivered through EACH of the two wires only to be filtered after it gets to the crossovers.   So the bass frequencies STILL interfere with the treble frequencies in each wire, as they would if only one wire was used.  CHANGE MY MIND. 

I believe RVs argument is something along the lines of having separate wires for the highs and the lows helps prevent back EMF from the large magnet in the woofer from interfering as much with the high frequencies. This I learned from a biwire question at one of his seminars. I suggest asking him directly.