Just purchase a D2000.2 amp and a MM1240 Sub. I am going to run this speaker bridged off of the amp. I understand setting the gain with a multimeter, but how do I set the crossover on this amp exactly. There is a switch that has "full, hpf, Bpf" where to set that. I am assuming that the LPF button it to be engaged but where to set the hertz to? I am assuming the HPF button is left in the out position so it is not engaged, but do I need to set the HPF hertz? thanks in advance