It's decent stock. Good quality. Can't drive it so much. I dropped some "preferred" 12ax7's in there and wow! Butter. Great sound. I like it better than most of my plugins. Its slow compression, so good on vocals, acoustic guitar, strings, etc. This is a keeper. It has a home right in between the 1176's, Distressor's, LA2A's, DBX 160's etc. Great first compressor to learn with. Don't hesitate.