Integrated amp: jumpers versus cables


Which is better? I have twice today seen recommendations for replacing jumpers with decent interconnect cables but have also seen reference to higher quality jumpers...
I have an NAD 320BEE amp with Dynaudio Contour 1.3 MkII speakers and would appreciate input on this.
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My brother has NAD that originally had factory jumpers made of "U" shape steel rods. Replacing them with short Audioquest jumpers (basically short IC) opened treble.
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