Talk to Frank at audioclassics.com
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You've had advice from an expert, Kevin H, but if you want more conversation, email [email protected], who advised me on the same issue. He also told me that CD's are usually made in such a way that it may not matter which polarity you choose--it can change several times through a CD, and it's hard to know which phase you're hearing, no matter how you arrange the cables. Upon hearing that, I left my connections alone, though they're just like yours, and don't seem to be suffering from it.
The only issue you are confronting here is polarity inversion, and thus Kevin (who is one of the real gentleman in this industry and also an extremely knowledgeable designer and manufacturer)is absolutely correct. In fact, if your preamplifier or DAC has a polarity inversion switch, as many do, then there may not even be any need to touch your speaker cables: just activate the switch as necessary or preferred. Based on extensive listening, I am also inclined to agree with Tom's comments about individual recordings being so variable with respect to polarity that the whole issue may not be that relevant on a practical basis.
My Threshold service manual suggests reconfiguring the interconnect between preamp and power amp in such a situation: "important: any associated equipment that is to be connected to the balanced input of an E-line amplifier (i.e. preamp, crossover, etc.) must be connected with an appropriately configured cable assembly in order to maintain proper system phase characteristics." In other words, keep hot to hot and cold to cold. Then wire the speakers normally. Why live in doubt if you don't have to? Good luck.