Originally Posted by REB
I was thinking a ground problem myself. I've just removed the amp from a very simple set-up: cpd->amp (it had the buzz then as well). Now it is slightly more complicated: computer (spdif) -> dac -> output selector -> ldI+. same buzz in this set-up.
what is a ground loop btw?
If you have it plugged in with power on but no input signal does it act like this? If it does, contact Davidzhezhe, this is a warranty issue that needs to be addressed.
Exactly what a ground loop is, I cannot say without probably saying something wrong... per wikipedia:
In an electrical system, a ground loop usually refers to a current, generally unwanted, in a conductor connecting two points that are supposed to be at the same potential, often ground, but are actually at different potentials. Ground loops created by improperly designed or improperly installed equipment are a major cause of noise and interference in audio and video systems. They can also create an electric shock hazard, since ostensibly "grounded" parts of the equipment, which are often accessible to users, are not at ground potential.
Basically, ground isn't going the right direction or there are multiple paths to ground. In audio this shouldn't happen. As an additional example, on my amp plugged directly into an X-FI I get a ground loop. If I remove the ground prong from my amps power cord it goes away. Best I can figure is the ground from the entire PC was running through my amp for whatever stupid reason. Creative is a bunch of retards I swear. (it's a creative problem, I'd believe not a Little Dot problem). It doesn't happen with battery powered amps, but then again they don't have access to the mains power.
Perhaps an expensive fix, but a DAC resolved this issue for me and now I use optical X-Fi to SMSL dac.
Edited by Aynjell - 9/19/10 at 7:20pm