HOW CRITICAL ARE JUMPER CABLES

Here are my thoughts on bi-wiring.  I guess if you are going to do it, use the same type of cabling that you have from the amp/amps. From there, you now have to deal with what type of connectors (or lack of) and be ready for all the opinions that one brand/type/termination sounds better.  Use good copper and make sure all the connections are tight/secure.

Over my years, I have not seen any discernible differences other than long ago running custom wiring from Chris VenHaus.  True bi-wire runs of silver (mid/highs) and OCC copper (bass) to my 802Ds from a Levinson amp.   That was several years ago and with much better ears.  Still trying to make myself believe is actually sounded better...

Do you have the ability to modify your speaker and internally connect the wires to one binding post.  This way you can pick your speaker cable of choice and not have to worry about jumpers?

If not, then I would look at bi-amping.  Although, probably not a topic the OP wants to pursue.

Still love the power cord analogy and how it pertains to speaker jumpers.  How does the last 6'/6" really make a difference.  I guess that is why we love/hate this crazy hobby.

So any benefit to getting jumpers and not bi-wiring? 

Very important if your battery dieds....give me a boost....lol

There are so many old fogeys on this board, I swear…I can hear my dad sometimes. You boomers just have the best sense of humor.

My experience about jumpers is with Monitor Audio silver 6 and Magneplanar LRS.In both cases, the results were obvious. Much better clarity in the mid to high treble regions, more air, better attack and decays, less grain in the sound, I made a pair of jumper with Duelund gauge 12 wire and Mundorf Connector BFA Beryllium Copper Banana Plug, I also tried Neotech gauge 12 solid core wire with Mundorf Connector with similar results.  Very happy results globally and not expensive at all.