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Very slight "Hiss"

When I press my ear next to the tweeter, either channel or input selection, I hear a "hiss". I have tried chokes, and changed physical position of IC's. However, I noticed that if I select an input that has nothing connected to it, the hiss increases. The hiss is small, but it really bugs me all the same. Might there be a way to eliminate it??
Thanks.
Rpg
rpg
gbart
290 posts
 
Elizabeth is correct. No electronics can achieve zero noise. What you guys are hearing is residual thermal hiss, which occurs in all electronics, regardless of quality or price. As long as hiss is inaudible from the listening position on the quietest music passages, there is no problem.

http://en.wikipedia.org/wiki/Thermal_noise

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srwooten's avatar
srwooten
694 posts
 
Tweeters have a slight hissing sound at "Ear-to-Tweeter" distances when the amp is powered up. This is normal. If you other drivers are "humming" this is differant and is likely a ground problem.
hifihvn
943 posts
 
Very common in various audio products.
rpg OP
126 posts
 
Thanks to those who explained the nature of electronics and the fact that what I observed regarding "hiss" is normal.

Rpg
chatta
314 posts
 
Every electronics device (audio) they produce a normal hiss if you hear it very close. Dont find faults in your system when is not neccesary.
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