[DRSpeed85]

I seem to have a rather hissy set up but I can't figure out where it is coming from. I know for a fact that it is definitely not from my headphone and amp. It must be from the computer, ipod, foobar or dac. I'm guessing the dac might not be the source. If so, then is it my computer that is producing all this hiss? Will a dedicated component get rid of this problem?

 

[facelvega]

remove every element individually, when necessary replacing with anything else that can perform the same function in the chain, and you'll see where the problem lies. Then we can advise you. Right off the bat try the iPod versus the computer. If it goes away with the iPod and in both cases you're using the same dac (and are sure that the problem is still there when the dac is out of the equation), then I'd be guessing it's some electrical noise from either the computer's innards (the fan, the hard drive, etc.), or a noisy ground loop through the power supply.