I've used the FiiO BTR5. It works well with the Stella. I've used both the balanced and unbalanced on it. I think the unbalanced sounds a touch better, but that may be more it has a little more power, and thus, can get louder volume. I'm sure the FiiO BTR7 works just as well; maybe a touch better.hello,what dac/amps you use with stellia ...
The two DAC/amps are nice because they do have some power, pretty small and very portable. And they're reasonably priced for what you get. Heck, the BTR5 was able to drive my old Sennhieser HD600 very well. It's not the most feature rich device. I think the sound it gives is pretty good. It's probably a good starting point in researching for a portable DAC/Amp.
I use the FiiO K9 Pro for a desktop DAC/amp. I think this is very good pairing. Not cheap, but not super expensive. It some quirks, but not in the sound department. There are plenty of reviews on it that can give you more detailed information.