I believe there's a TB review of this, and darn near every other compressor. It's my understanding these were made in the USA. Two 12ax7 tubes. This unit has one JAN Phillips and a Sovtek, provide cool sound, lots of gain and a workable compression. And I'm doing for $50 shipped CONUS. The pics aren't the best. The unit is missing two screws. If you have any comment on making the pics better please be free to share. If you can't be positive don't share. I just cranked this baby up and not only will it compress but it can do clean gain, dirty gain and drive that lazy front end into saturation. This unit does show signs of use. My camera skills aren't what they should be. Any pointers would be welcome.