Waddiewadkins
100+ Head-Fier
And the BTR5 would be considered a wimp compared to Gryphon and most other recommendations!....?...I use a Fiio BTR5 and it powers them just fine. Was worried that I'd have to find a new BT/USB DAC but that's not been the case.
On low gain using the 2.5mm balanced output I'm getting ~105db with the vol at about 40/60. I've turned it up louder for a few sec just to test and couldn't hear any distortion.