This little headphone amplifier is fantastic! I added it to my home studio setup so that artists can control the volume of their mix independent from each other. It works like a charm, you have easy access to all the volume pots and can even amplify a signal to be louder than its source. This box is smaller than you'd think but it feels incredibly durable! It also works great as a headphone splitter that won't lose signal or quality. This is a Sam Ash Employee Review.