I went thru a rather exhausting speaker cable search going from name brand cabling to DIY and all manner of mix and matching in guage and composition.
For example I used a combo of solid core copper and solid silver of different guages, one for the top one for the bottom.
To make a long story short, some music seemed to favour one type of set up,and sometimes the thicker guage on the top end made for a more full midrange type of sound.
At other times, this wasn't a good thing.
As far as jumpers go, the stock ones weren't very good, and no jumper set up was as good as two separate runs of wire.
I am in agreement with keeping both runs exactly the same.
In my case the system sounds more coherent.
