One thing I really like about the Doge is that you can use it with both headphones & speakers at the same time if you choose. Most of my other headphone amps cut out the speakers if a headphone is attached. I fined that very useful since I work on broken/damaged speakers & can use my headphones to help me compare speakers I'm working on.
Nice. Always wished my Head One had that feature so I could use the sub out to connect to my buttkicker or sub at the same time as using it for my headphones. Instead of having to use one headphone amp for my headphones and one for my buttkicker