I've never heard a difference biwiring unless I used dis-similar cables to act as a poor man's tone control, which works by the way, at least until you can afford to by a proper matching amp for your speakers.
To Biwire or not to biwire
Looking to hear from people that have biwired using one amp (not bi amping). I read a lot about - works well in a poorly designed loudspeaker, but makes it worse in a well designed one (see Coincident Speaker web site). Looking forward to comments. I am using Coincident CST speaker cable. Thanks in advance.