I'm borrowing an Ampeg 2x10 Classic from a friend of mine to use for in-room practice. Since I'm building a cab of my own, I decided to take a peak inside to see how everything in there was laid out. Turns out it is made of composite board?! What happened to the birch listed on their site? I don't know.. It was surprising to me. How often to big cab companies build their product out of cheaper wood types?