Sound color with different jumper materials,

carlsbad, I just try, and there is much more presence from the music, by at least 10%  bass-mid-highs, also with better details.  Next, I would probably try a new Jumper, made from solid Copper with Silver.  But for now, its like a realy good upgrade from my system, thank you for your relevant observations.  You were right, my big speaker cable is now at there best feeding the LF (and mid), the Jumper complete the HF with better expressions.  Thank's again !

try an external biwire or at minimum Audioquest silver jumpers….silly inexpensive for sonic benefit….

On some Von Schweikert speakers the recommendation was to run the speaker cables to the high frequency, and then jumpers to the low frequency.

It sounded a lot better that way on those speakers.

Alternately if you are not bi-wiring, eliminating the jumpers by opening up the speakers and piggybacking the low frequency wires to the high frequency binding posts on the inside of the speaker will give you the best results. All you need to do is take a photo before you do it so you have a record if you want to reverse it.

On a pair of Tannoy Canterbury SE’s we tried all options - bi-amping, bi-wiring and single wiring and on those speakers single wiring with the low and high frequency piggy backed inside the speakers to eliminate the need for jumpers was by far the best sounding option.

If ML says so it must be true.🙃No passive crossovers for me but if I did jumpers  would be solid silver with amp wires to woofer. Have fun

Take two pieces of wire, check the way they were pushed through the extrusion die. Twist 12-14" of # 18 or 16 UP OCC SC copper with .99999 UP OCC Silver. 4-5 twist per inch Clockwise. Put the 2 in an air tube. Twist 8" of the two tubes. Zip-Ty to hold. 

Kitty corner the - + from bottom left to top right. Remember the direction the wire went through the dies and that is the direction of the arrow for reference. Mark the outside of the air tube. Find someone to condition your new cables. You just built the best jumpers you can if your going to go that route. 1-200 hours and you can swap the position where you want. Once you make up your mind, find a good enhancer and treat the ends. Tighten everything and leave it. It only gets better with time.