Featuring two 6J1 driver tubes and two 6P1 power tubes, the new mini2013 6J1+6P1 tube amp delivers great noise performance, frequency response, and power output for the price. It’s beautifully built with a solid metal chassis in the color of your choice, and provides enough oomph to drive your favorite bookshelf speakers. Plus, this new version adds the ability to pick between a speaker out of 4 ohms or 8 ohms via the banana jack plugs in the back.