There are active crossovers by companies like pyramid, but most of the cheaper ones are designed for use in cars. If you want one for your home, it will cost you some $$'s. I tried both the active from Pyramid and these Harrison Passives and I just went with the passives because the active did not give me enough headroom and it introduced too much noise. It only cost $20, but now I know. You probably could use an ICBM in this instance to get what you want. But if you had to spend this much, then you might as well buy an entire amp unit for your passive sub that has the controls built in.