I have the Skar Audio SPX65C 6.5" component speakers. There are 3 switches on the crossovers and I do not understand them. Is there anyone that can explain each of the 3 switches to me, what they mean, what their functions are, what each setting would do? My car audio terminology is not very advanced so simple terms would be best, if possible. Here is a pic of the crossover then 3 pics of the different switches. any help is appreciated. In case you have trouble viewing th epics, here is a description of the 3 switches: "TW" - settings are 0, -3db, -6db "Mid" - settings are high, flat Unlabeled switch - settings are 18db, 12db