I own an ARC VS-115 which has 4 and 8 ohm taps. Although my fronts are nomonally rated at 8 ohms, the impedance drops to 4+ ohms in low bass. A couple of A'gon technies suggested that I try both taps and use the taps that sound better. I did. Interestingly, while the specs "suggested" that I might do better with the 4 ohm taps, the fonts sounded like they were being driven under water. I switched to the 8 ohm taps and all is good.
So, I agree with Riley and Tom. Tried both and use the taps that sound better. Good luck.
So, I agree with Riley and Tom. Tried both and use the taps that sound better. Good luck.