When interviewed about the unique tones on STP's "Tiny Music and the Talk Show LP Dean revealed that he used only single coil pickups and small vintage combos with 10" or 8" speakers in the studio at that time. A complete list of the amps Dean discussed in interviews was compiled on belowempty.commore
I bought this because of Sara Watkins' usage of it both live & on her record "Young In All The Wrong Ways". It is 5 watts, with an 8" speaker, which is not very attractive until you hear it. Someone before me modified it to accept external speakers as well as a newer Weber alnico. This thing doesn't sound like it has an 8" speaker. When you push it, it becomes this full & awesome monster.
I also recall reading that James Duke has a Valco made Gretsch 6150; the same as this Supro. He's a hero of mine.