I have a Divided by 13 EDT. I love many things about it. It has a head and 212. A celestion blue and a V30. My other amp is a Carr Imperial with 410. It is stock with 4 10 kingpins. It sounds amazing. I am wanting to know of tubes and speaker changes that you guys have tried that resulted in better sound. Primarily I find the bottom end too low and the top too high. And I would like to thicken the midrange more.