What should the HPF to on my HU? Also, should I put it on the "1" or "2" subwoofer setting? It seems louder on 2, no idea what the HPF does. System is in my sig.
Actually on these things the max, whether its 10 or 15, is zero, as in sub playing at full UBOOSTED volume, and 0 is negative 15, as in the sub is attenuated. Really gains and other tuning should be done with the sub at 15 then you only kick it down a notch or two if you feel you have to in order to get it to blend properly. Shouldn't be necessary if you have front drivers capable of half way decent midbass and your filters are set right.