Hi , I wanted to know what are the specs I need to check when looking for dac/amps or just Amps that have no hiss with iems. I'm new at all this audio hobby and I only have the Fiio ka1 and when I plug it into my cellphone with my Ikko OH10 and S12, both don't have any hiss at all. However, when I use the ka1 in my laptop, there is a noticeable kind of static hiss when using my S12 and the OH10 has a beep sound in the left side and it bothers when there's no music playing or when watching videos. This is a problem too because I listen to music at low levesl. I wanted to buy the Qudelix 5k for bt and all of its functionalities, but I'm tempted to get a desktop dac/amp or dac and amp combination because I want to buy a pair of headphones like Hifiman he400, sundara or Senheiser 560 or 6xx in the future, so a gear that works for both iems and headphones would be great. The new Fiio ka7 looks good with both unbalanced and balanced outputs, but I don´t want to get it if it will give me the same problem as the ka1. Any recommendations on what dac/amps I should get are appreciated or maybe just get the Qudelix 5k. My budget is around 200 dollars. Thanks.