As Shadorne pointed out, impedance is the big issue here. Check out Townshend Audio's website; their Isolda Matched Impedance cable is supposed to tackle the issue (have never tried this myself though)
http://www.townshendaudio.net/index.php?option=com_content&task=view&id=32&Itemid=86
http://www.townshendaudio.net/index.php?option=com_content&task=view&id=32&Itemid=86