HUMMMMMMMMMM - UPDATE!
This has a frustrating hum when used as a microphone preamp. If you are expecting to use this to record vocals, caveat emptor.However, I've had better luck using this as a guitar preamp after removing the chinese 12AX7 tube and replacing it with a Grooves Tubes Gold. It is running into a cheap solid state practice amp and has vastly improved the sound. Crank both the knobs and you will get a nice tube saturation, albeit with a noticeable hum. For $30, this really improved the sound of my mediocre guitar amp.In short, change the tube and you might find some nice guitar tones.