Inverted phase preamps?


What is the best way to adjust for this in your system? Could you give a detailed view of what you reccomend, for example: reverse speaker wires at the amp?,etc. I have heard different ideas from some reputable people. I know that it comes down to what sounds the best, but I would be very interested in hearing your experience with this. Thanks.
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I have a Joule Electra LA150 and Jud (the designer) told me switch leads at either speaker or amp end of speaker wires, doesn't matter. I've done both and cannot hear a difference, however, a couple times I forgot to reverse at all and man, oh, man can you hear the difference!
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I have a Cary SLP-98L and the manual specifically states to make the switch at the amp end. As for hearing a difference quality wise I don't know about that. I do know that on the live recordings I have made and play on my system that when the phase was not inverted the sound was off balance which makes sense.