What speakers are they? If they are Harbeth's you should use a single wire connection and the stock jumpers.
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Yes, it really depends on the speakers.
My currrent speakers benefit greatly being bi-wired.
Since your speakers manufacturer went to the trouble of setting up yours in tri-wired configuration, it probably would be an improvemnet to bi or tri-wire.
If it was me , I would use thin pure silver on the tweeter.