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KantoLiving, wanted to ask a general question...
Have a nice PC motherboard with better than average on-board audio. Unfortunately, like most who try using on-board audio I hear a pot of high frequency interference. Using Optical in, it is non existant, but these speakers sound so much better using the RCA and 3.5 inputs. Do you reccommend running an external DAC, and if so do you have any favorites? I know this isnt a defect, as I have tested several devices that do not have this interference. P.S. I also paired with Kanto Yuri sub, couldnt be happier. This was a generous discount, thanks for the business!!
Using a ground loop isolator via 3.5mm / RCA will get rid of that noise. Personally I'd just use optical, not sure why yours sound that much better using analog inputs, I haven't encountered that before. Are you sending it a 24/96 signal?
I am in-fact at 24-bit/96KHz, and I believe the RCA/3.5 outputs to be amplified off my motherboard DAC differently than the Optical output. I just haven't experienced this problem before... Forum users have suggested RF interference from wireless perripherals (I do not have any wireless accessories), bad grounding issues (I don't see how that would be possible), and cables may be culprits (I have tested the factory and premium cables, same issue). After reading more, I found this to be a common issue because the motherboard causes electrical interference. I feel that this is why DACs are the popular option over even sound cards, users want to separate audio processing from "the box" all together. The easiest fix is just to use the Optical output, I'm glad I picked a motherboard that has Optical output elsewise I would be going the route of USB DAC.