looking to replace Fyne speaker jumper cable

Why would you ever want to run the speaker cables to the woofer terminals and then jumper to the high terminals?  Don't you want the purist signal to your mids and trebles?  And then you want to change to 4-6" silver jumpers serialized with your 8' copper cables to bring on greater treble?  I think you will have to strain very hard to hear any difference by doing this.

If your system is lacking treble extension, fix it at the source of the problem.  Using cables as bandaids to compensate for tonal incoherency is never a good idea.  And there is no guarantee that silver here or anywhere else in your system will fix your problem.  It's not always the wire material, but rather the cable design and implementation.

@jafox  Makes a good point about the mistake of using cables as tone controls, although I disagree with his spelling of purest. 

Why don’t you just use the Puritan jumpers?

If the OP's goal is neutrality, WireWorld would be my recommendation.

Honestly, my old, beat up ears are no longer good enough to tell the difference between short jumpers.

A long time ago, industry insiders determined that they could retire early if they could successfully market cheap to make wire as expensive, exotic tone control cables (exotic creatures, anyone). Now, it's dogma. Sheesh.

the reason why I want to try jumper cable is I want to see if single speaker cable with jumper as good as bi wire cable can be, or even achieve better sounding experience, to me upgrade single speaker cable seems more cost efficiently, and ease to sell on used market too, guess there can be more budget room to play around with variate jumper wires other than buying variate bi wire cable set. Keep trying to find the best bang for the buck for speaker cable instead of breaking my bank here. Thanks for all your help here!