I have just rewired my Mcintosh XR100 loudspeakers by running one pair of Cardas Golden Reference cables from my amplifiers 8ohm leads to the speakers woofer connectors and a 2nd pair of identical cables from the amplifiers 4ohm leads to the speakers mid/treble connectors. The result was just fantatstic. Without going into all the audiophile adjectives all I can say is that it far surpassed all my other experiments with bi-wiring and jumper cables. Wondering if anyone else has had the same experience. I am one happy camper!
It seems to me that you (if the jumper wires are removed) you have changed the impedance of the mids/tweets as far as the amp is concerned. Have you tried swapping the leads between the 8 and 4 ohm taps to see what the diff is?
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