gain, lpf, ssf all depends on your install and all the rest of the components of your system. Its something you're going to need to figure out on your own. LPF should be between 60-100 i'd say. Dependign on where you cross over your full-range speakers //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif