I'm building a separate amplifier and cabinet for my lower frequencies, and I need some help. Here are the things I'm thinking I need right now: A speaker box A subwoofer (12 or 15 inch) A power amp (thinking 500 - 800 watts) A subharmonic synth (Furman Punch 10 or dbx 120) An A-B switcher to turn the signal on and off Has anyone else built one of these things? Is this all I'll need? Do I need more things, like a preamp or additional crossover? How big will my cabinet need to be? See, I've got all of these ideas, but usually I just know enough about what I'm doing to get the basic ideas down. Any help would be appreciated!