All this is fine and good, but my question is... if this is the case, why are 8 and 4 ohm the most common subwoofer impedances? I feel in most cases it makes things much more complicated than needed. If I have 2, 4 ohm subs, and I wire them parallel I now have a 2 ohm load, if I wire them series, 8 ohms, effectively halving the power the amp can give them. Wouldn't less power at a lower load be better than trying to cap the thing out with more resistance?