BiWire Jumpers on biwireable speakers.

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If we can't get a well designed double blind listening test, we have to make do with individual listening reports which at least would be somewhat indicative one way or the other if there were a reasonable number of such reports with a strong consensus on whether or not there is a difference. It's definitely not the best way to do things but it's the only way to do things until a better test is designed and conducted.

No matter how many individual, anecdotal reports you collated, even if they showed a consensus for a difference in sound quality it would tell you nothing about whether the perceived difference is caused by the difference in speaker wiring (objective), or other subjective factors such as bias.  And if there were a consensus it still wouldn't determine whether any given person would actually hear a difference.  So the whole exercise of collecting such anecdotal reports seems to have rather limited value from the point of view of discovering any useful "truth".