I don't think that it is that much a silfish problem as it was Jolla 1 problem. I didn't hav the chance to test it with any other sailfish device but the thing is that it was like there wan't enough power in the phone to drive some better earphones. I got better sound from some ~10€ sony buds than from mdr-ex650 or xba-c10. And I did used quasar MX but even with it's internal aplifying setting it just didn't work.