Passive vs. active crossover?


I know I am beating this to death , sorry but it's my nature just look at my turntable I never stop.
So my question is : my system sounds incredible now, I have my preamp output going into the sub's input and a high pass going from the sub to the power amp. But it is single ended and I prefer running my pre to power with balanced. Will it be easy to make a filter that removes say around 40 hz on down using balanced ic in a passive circuit. Or should I stick with active? And which one?
pedrillo

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