Actually, subs wired a certain way only impacts impedance, not amps. Amps only do what the subs tell them to.
With the knob, No also. The Pac will be better and easier. Basically, as a wise man once said, 'They tie inline with your RCA's and attenuate the signal instead of adjusting amp settings.' Basically, it only adjust the signal that the rca send vs adjust the 'gain' like normal bass knobs do. If that makes sense???
okie dokie good to know. always good to learn something new