Tube amplifier using pair 35L6 output tubes with 12ax7 driver. Amp has the schematic diagram on the inside of the bottom cover so it should be easy to convert to a guitar or other audio amplifier as desired. Item is untested and sold as-is but as you can see in the pics it is in nice clean condition. Includes the tubes it came with which are all American made. Buyer to pay shipping. Thank you for your interest in our listings and have a great day!!