true but i never really have liked the sound of door speakers crossed lower. the few set ups i have tuned always soumd better crossed around 125. i probly just havent dealt with high enough quality speakers that sound really good crossed that low.
i usually set the lpf filter very little above what the headunit is at. so say its at 80 on headunit set it around 85. thats how i do it though. everything is variables. just play around with it for a while.
Did you just skip my post or what? If your not getting air movement from the port, that's a power issue that has NOTHING to do with a crossover. Your probably tuned near 35hz, your crossover setting are only messing with things around 80hz.. Download a tone and try what I said. For crossover's it really doesn't matter which one you choose. I prefer the HU for a LPF, that way I can change it on the fly although keeping the HPF at the amp is ok for the opposite reason. THE HPF protects the sub in some case and you don't want that to be turned off accidentally. If you tuned at 35ish, try 80hz and 25hz to start. From there you can play with it and see how high it can go. Generally speaking it's best to let the sub play as high as it can as a sub will play 125hz cleaner and louder than any midbass your going to have in a a door.
Do not do this.
