This is a sweet amp from the 60's. 12 inch speaker which I pulled from a vintage hammond organ so I think the speaker is a Jensen pr12. This is a fantastic speaker and might be worth $100 for simply the speaker. The back panel is missing and the power plug in is not initial. New tubes in it and she sounds wonderful. The pots are a little scratchy however most likely just need to be cleaned. The tremolo doesn't work and I don't know if it is because I don't have the footswitch or what. However come get a fantastic amp for a fantastic rate. Let me understand if you have any questions.