I have one of these old Kustom 2x15 cabinets. http://www.vintagekustom.com/images/newlit/150250500//04.jpg Unfortunately, the bottom speaker, while original, is blown. The top speaker works great if you want your bass to sound like a southern fried six string telecaster. I can't understand how a speaker can make everything that comes out of it be nothing but twang, but it does it. Anyway, I would like to replace the 15's with something else. At the moment, I have access to some inexpensive 12's, which would surely be a step up. I'm looking for thoughts on whether I should put two 12's in it, wait until I can get 15's, although that might be a while, or do something else. One thought I had was to try to put two 12's in it with two 6's or one 12 with two 6's as sort of a poor man's/lazy man's hack of a fEarful. I would appreciate any thoughts or suggestions. Thank you.