Quote:
Originally Posted by
Jenavar 
Almost every review or "first impressions" I've read points that the E11 will hiss with sensitive iems. I don't notice it when using full sized headphones, for example the Sony XB500. These are only only 40 ohm, and I cant hear the hiss while using them, I can only imagine with higher impedance headphones no one can hear the hiss
The advantage of FiiO equipment is the relatively low cost. The reports I'm reading here indicate the penalty is hiss (apparently inaudible with less-sensitive headphones.) But every amplifier has some "noise floor''. It's inescapable because that's how all electronic equipment works.
In my opinion, one of a designer's jobs is to make that noise inaudible. OTOH, a designer may choose, knowingly, to allow noise into their design because to eliminate it raises the cost beyond an acceptable level. I didn't think of this in my original "it must be broken" post. That was a mistake.
If the listener can't hear the noise or is willing to accept it for whatever reason, it's really their choice. I wouldn't buy an amp like this, but who cares?