Originally Posted by JaZZ
You don't seem to understand the concept of crossfeed. It consists of a specific crosstalk, predominantly in the (low) bass, clearly less in the midrange and preferrably not at all in the treble. Additionally it implies a phase distortion mimicking the natural runtime differences of excentric sound events. With a good implementation (like mine
) threedimensionality and realism of soundstage are fully left intact. Channel separation has nothing to do with it, apart from cases of extremely low figures not present in modern amps. Moreover the perception of sonic depth is a function of resolution and accuracy, insofar as they facilitate the (unconscious) detection of spatial cues on the recording (separation between direct instrument sound and reflections). With headphones the preservation of the outer-ear function for decoding spatial cues adds to this.
Actually, you are the one who seems to have problems understanding the concept of crossfeed. Channel separation has everything to do with it. There is no possible way to crossfeed and have 100% of the "soundstage" intact. Can it be improved for headphone listening? Certainly it can, but you are reducing it by decreasing stereo bias.
I suggest you at least do some preliminary reading on it before posting about it or think about this in a more logical (i.e. less false) way of thinking.
You can use crossfeed all you like, but a device that has it without the ability to turn it off is inherently flawed. Ideally we should be aiming for channel separation that is of the same dynamic range as cds or higher, and crossfeeds should be left optional (as I think meier audio does on their amps if I recall correctly)
The hifiman is -45dB crosstalk, so it doesnt reach your magic number. You can do the calculation regarding how much louder 50 dB is, as I am too tired
Edited by MrGreen - 5/8/10 at 8:48pm