[ExacoMvm]

Hello guys, i just got the RCA cable and i've noticed terrible noise coming from FiiO E10K line out on the back, when i plugged into phone there's zero noise even on high gain max volume. I tried to plug it into PC Onboard and Monitor and both has the noise but alot less than E10K.

I tested few headphones ( 598 and 4XX ) both has exact same sounding noises.
In short: Phone ( no noise ) -> PC/Monitor ( slight noise ) -> E10K DAC ( Insane noise almost as loud as the sound source itself ).

The noise is like that: Continous high pitch coil whine-ish sound and inbetween some cracks is heard almost like very irregular heartbeat.

Any suggestions what the problem could be? Seems like FiiO's QC is really bad, first i received semi faulty E10K and now K5 ?


Edit: If i plug USB Charger to the phone the noise appears, its even enough to touch the 3.5mm jack with fingers and the K5 causes some noises.

SOLVED
The problem was wall port. Switched to another and now its fine.

 

[valkyrieorion]

I have this with the K5 Pro (only when playing Elite Dangerous) to my powered speakers (and I hear it in my headphones) As soon as I unplug the speakers from the RCA line out it goes away. Did you unplug your computer from it's wall port or the k5 pro to another outlet (I have them both plugged into a UPS).