Hello! I’ve already got a lot of things together for my system and now I would like to know what the difference between active and passive crossovers are, as I understand it, come passive switches after the amplifiers or directly in front of the box and active directly at the Cinch, is that right? Have now a Sony power amplifier (model XM-754HX – is ne 4channel) and would like to connect 2 subwoofers (20ers with each 100Watt RMS frequency response of 25-4000Hz), but want to connect the subwoofers b a run about 100-250Hz, first to free the subwoofers from the extreme low basses and secondly not to let the frequencies over 4000Hz penetrate, so that the subs play optimally… But now I only have the choice between high pass and low pass, there is an elegant solution (maybe not very expensive), how I could do that? What do you think is better? active or passive? Wanted to connect a subwoofer to each channel, am thank you for every tip ar!!! Mfg! DannyNRW