Graph Feppar
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- Joined
- Nov 19, 2018
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I plan to buy Fiio K3, a tiny 99€ dacAmp that gets power through USB, it doesnt have separate power connection, no brick.
I have read alot and I noticed these cheap small dacs and dacAmps dont have USB galvanic isolation and often users report or even measure some noise or morr specific, inharmonic idle tones that I believe are harmonics of AC power. I am no expert but I believe its some ground loop USB coupled crap.
Does balanced connection to headphones help with this problem? Mind you, I mean the K3 which is amp and dac in one box, I think it might be different if the amp and dac are separate and are connected by unbalanced connection. I believe the K3 is internaly balanced.
I have read alot and I noticed these cheap small dacs and dacAmps dont have USB galvanic isolation and often users report or even measure some noise or morr specific, inharmonic idle tones that I believe are harmonics of AC power. I am no expert but I believe its some ground loop USB coupled crap.
Does balanced connection to headphones help with this problem? Mind you, I mean the K3 which is amp and dac in one box, I think it might be different if the amp and dac are separate and are connected by unbalanced connection. I believe the K3 is internaly balanced.