Don't worry so much! It's just an ordinary piece of hardware, but your health is the same and it's priceless! We have already understood that you absolutely do not like KA17 and this cannot be changed. For my part, I also do not consider KA17 to be a perfect product. I ordered it just for fun, if you don't like it, I'll send it back to the seller. But home use in the most powerful mode is just right for me, I'm not going to walk down the street with it. And I'm waiting for another product - an ultimate sound quality solution, a new DAC from E1DA 9039S with balanced connection. Inside the ES9039Q2M DAC, CT7601 bridge, 2*3000 UF power filters and opa1612+ad8397 composite power amplifier. The prototype is said to play divinely and it is unlikely that KA17 will be able to compete with it in accuracy and detail)) Yes, it will cost almost as much as KA17, it will not have a screen, it will only have one balanced 2.5 output and it does not have an application. And it scares me to think how you would scold him that he can't do anything for that kind of money.