Why not use a piece of silver wire instead of a jumper cable?

I don't use jumpers, but if I did they would be silver. I'm a big silver believer!

Your silver wire jumpers are probably as good as anything you could purchase.  If they sound good to you, then stick with them.  However, some like terminations on their jumpers for convenience. 

Wire and connectors that might work well for those making their own jumpers include 5N OCC 14awg copper, or 5N OCC 16awg silver.  Consider KLE Bananas, which are silver plated pure copper and are stackable, and simple copper spades like these from Vampire or these silver plated copper spades from Xhadow.

Then why do some here crap on others for using interconnects or speaker cables constructed of silver or copper plated with silver? Never understood that, as My QED silver anniversary speaker cables have always sounded great to my ears. I guess Ortofon knows a secret or two as well, as in both the 2m bronze and black, they use silver plated copper wire in their construction. 

"Tin the end with 4% silver solder and silicone the tube closed."

I've found that silicone makes the sound top heavy.

DeKay

If using a jumper to connect two sets of binding posts, connect your power amp cable to the tweeter posts. That way it is the woofer which sees the extra connections and jumper cable, not the tweeter.