Before you all kill me, I've checked the faq, and done a search, and most topics assumed some knowledge on the subject. I have none. Now I need to upgrade my amp (badly) and well, combo's are simple and maybe something like the fender rumble 100 will do me. But that's beside the point, I'm looking at head units and cabinets and have some questions about them: when you get xxx watts on x ohms on a bass head, what does that mean in terms of the speaker size and power ratings I can attach? How do you connect a head unit to a cabinet, and where would I get one, and for how much? What kind of power would you need for a medium sized rock gig? Thank you very much to anyone that answers rather than flaming me.