HOW CRITICAL ARE JUMPER CABLES

I use the same materials to add jumpers to a speaker cable as I do in the main part of the cable. Not doing this will hurt the total performance of the cable. However, jumpers have different design consideration then the main part of the speaker cable. My preference is to use the same number of total circular mils of conductor material for both the main and jumper parts of the cable.

There is nothing like run bi-wire cable to speakers if you have a proper set of speakers and amps for the task. The performance will exceed a speaker cable with jumpers by a considerable margin. Here is a link for more information 

Very critical I buy Furutech connectors with screw down wire terminals 

and Neotech Awg12 Teflon 6-9pure copper 6 inches each 

and much better then the rip offs in many $$ companies  it cost me maybe $200 or less , parts connecxion has a 20% offsale  and $15 overnight saver for shipping 

Pretty critical if you’re away from home with a dead battery. 🤣

Using the same speaker cable for jumpers makes sense to me.  In my Tannoy users manual, for single wire mode, it shows amp cables connected to the high frequency drivers with the jumper plate between the high and low frequency drivers.

I use Audioquest Rocket 88 double bi-wire cables that are labeled.  Making the correct connections is a no-brainer.

I agree with "audio-union" about bi-wiring. That made a significant improvement with my 802D's.