I’ve just picked up a Fiio BTR3k, I love it. But, the volume out of the 3k compared to even my laptop is way less. I don’t listen to music loud, usually 65% MAX, but I can comfortably listen to my 7hz Salnotes zero at 85% out of the Fiio. The same goes with my Grado 60x’s. The btr3k gives a noticeable bump in sound quality, especially with the zeros and the convenience is amazing. Does anybody know why this is happening?