I'm floating in the realm between purchasing a cab or making one. If I make one, what kind of woods should I use, speakers, horns, electronics, etc. And could someone help me with the impedence problem. Would it be better just to buy one? I have a Peavey Combo (Basic 112), and I'm looking for a good extension cab that I could use later with an Ampeg head. The Peavey says 8 ohms minimum. Any help would be appreciated.