Really? 35 hz? What the hell do you listen to...pipe organs and whale music? Not that there's anything wrong with that, but most music has very little bass below 40hz, and asking your mids to take charge from there on up is a lot to ask for a typical system. 60-80 hz is about right for most.

This is for the subwoofer right? ... because I set my amp to not go below 30hz or above 60hz. I listen to all kinds of rap. If I set my amp to not go below 50hz than there is hardly a decent lower octave or atleast it sounds too peaky. On chopped & screwed stuff, it goes well into the lower 30's. Like Daz Dillinger - My System has got to hit around 25hz as it's barely audible bass that slams. I like only 30-40hz, the low-lows and the bass that pressurizes. Above 50hz sounds like an annoying buzzing. At -24dB/octave it's quite a loss if the LPF is around 60hz, especially on stuff like Jeezy, that's 48dB, right?

^^I think you're mistaking the terms. Acoording to that...you have your sub band passed at 30-60 hz which is fine. A subsonic (infrasonic) filter in this case is the HPF as it allows everything above that frequency to be played. The LPF is the subs cut off on the high end....so when you said LPF of 35 hz, I thought you wanted your sub to just play 35hz and below. What you have is HPF of 30hz and LPF of 60 hz...switch the names.