I still have my first amp head (a tuck and roll Kustom 200 guitar and bass amp). I don't have the cab that came with it. It had two 15's and a horn in it. What I am looking for is the plans for a enclosed and ported cabinet with 2 15" speakers. I know there was some baffling in the original cab. There must be a min. volume for the cabs too. The combo amps I have built have always been open backed.