The DX50/BH2 value depends on the headphone. It adds a lot to my NT6 Pros and my LCD2s, but has less wow with my HD595s. The HD595s still sound better, but not enough to justify the inconvenience on the road.
While the DX50 is ripe with clarity and detail, it is a bit flat and involving compared to adding the BH2. The BH2 takes the texturing from a 2D to a 3D sound adding feeling and emotion that gives you goosebumps. It also adds a euphoric feel and slam throughout the frequency range while retaining the clarity.
Not having a higher end amp to compare the $100 BH2, it makes me wonder what is possible with a much higher end amp such as the Pico Power or the Portaphile 627. Would it really sound $400 dollars better or am I already 95 percent of the way there with the BH2 given my current headphone collection?
BTW, the 80 hour battery life is true. I have only recharged it 3 times in the last 6 months. That sure beats 4 hours battery life with the Portaphile 627. In terms of fit stacking with the DX50, per the pictures below, it is a close match width and height wise perfectly fitting up to the curve of both so it is not going to tip while operating the buttons on a desk. As you can see, the line in and line out match perfectly. Length wise, it goes from matching bottoms to past the volume down button providing ample support again laying on the desk.
THANKS SO MUCH FOR THE HONEST STRAIGHT AHEAD EVALUATION ........