Why not if it sound good to you. Some folks use same wire, but use double runs to bass. MIT Bi-Wire cables have specific high and low frequency connections.
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I tried it once with two bi-wire cables on speakers with three terminals, and after playing around concluded it was best with the Monster on the highs and lows and both of the XLO's spades on the midrange. After a few months I got a pair of tri-wired Straightwire Crescendo's, and the result was so much better I concluded I'd been kidding myself. Strongly recommend a single cable in bi-wire configuration.