This one you'll have to try and see for yourself. Some amps vary DRASTICALLY with their various impedance taps and the loads placed upon them by differing speakers. From an electrical standpoint, you would normally want to pick the tap that best matches the LOWEST impedance that your speaker hits. As such, the 4 ohm tap should work best for you in theory, but that may not be what you prefer sonically. Having said that, i'm not familiar with this amp or your speakers at all. Sean
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