Bi-Wire with two pairs of speaker cables

It also depends on the type of speakers and how it was designed.  If you have a small two way monitor, then the difference is probably minor.  

If you have a three way speaker AND if it was designed such that internally, there is a separate run for the bass driver, and a separate run for the mid and tweeter, then you probably will have some nice improvement.  BUT if for whatever weird reason, they combine the bass and mid in a single run, then the tweeter in a separate run, then it sorts of defeats the purpose of bi-wire and you may not get much improvement.

In most cases, it's the big bass driver that is guilty of modulating the rest of the drivers and that is why you need to isolate it be it bi-wire or bi-amp.  Better yet, if you could isolate the bass and give it its own amplification, it's even better.  I once bi-amp my speaker, and there was a significant improvement in detail, definition, soundstage and pretty much everything. 

Digging up an old thread here, want to try this with two different cables to my bi wire Q Acoustic concept 40’s and cables to my powered sub all on the single binding post of my moon 240i. Concerned that this will stress the amp, I’ve run it for an hour at low volume and did not notice any adverse effect, amp still runs very cool.

Not a problem.

"....I have tried this, but to my ears the only thing that improved the sound was replacing the little mettal strip-jumpers (those generally supplied with bi-wire speaker terminalss) with a quality jumper made from wire...."

williewonka,

Is there any technical reason why wire jumpers are better than good quality metal straps ? One could argue that wire jumpers are, in fact, inferior because they introduce two additional junctions where the wires are soldered or crimped to the terminations (spade lugs or banana plugs). 

Is there any technical reason why wire jumpers are better than good quality metal straps ?

If the plating or base metal was poor, there could very significant sonic effects.

Well done crimps or soldered connections are functionally one. In a crimp the metal is mashed into one with the spade.

A pair of metal strips has a quite different LCR than wire. Strips have no dielectric, so the wave travels in air rather than the dielectric. Strips are flat, so therefore have an asymmetric flux field. etc.

Don't believe any manufacturers claim as they have not test their product in your system. In addition, the evaluator does not have your ears or preferences.

Bottom line is if one sounds better, use it. If not don't.