The product is a vintage Gulbransen APS-5 tube amplifier, featuring a push-pull configuration with 6L6 tubes and a variety of other tube models such as 5U4 and 12AX7. This mono amplifier has one audio input and output, input via RCA connections. Known for its strong sound quality, this classic piece of consumer electronics is a sought-after choice for audiophiles and music enthusiasts looking to add a touch of retro charm to their home audio setup. It is suggested to use matched pair of 6l6gc at least gb as not included. The other tubes are included……. Upgraded to 3 wire grounded cable.. Carrier damage claims are handled by the carrier…….