Well, as I indicated, I'm still not sure exactly what Doug plans to do, but as John B. indicated, it would only be the left channel(positive connected)that would be driving the speaker if that proposed wiring was used. That being the case, it seems to me that the left channel would be driving the impedance of the speaker(the nominal 6 ohms of the VP150, as Alan pointed out)and this wouldn't be changed in any way.

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Enjoy the music, not the equipment.