When I received the product the volume control potentiometer was very loose. I tightened it up and it does work fine. However this potentiometer feels very poor quality and I don't expect it to last. I haven't opened it up, but I can see that the overall build quality is poor on the outside. As far as how it sounds, it's okay, not great. lacking in lows to my ear and the treble is a little too much. I guess that's what you get with a $100 tube amp.
johncelliotOne audio channel keeps cutting out, I have to wiggle the potentiometer to get it to come back. It often cuts out when I'm adjusting the volume as well.