After re reading the review of the H-340 and finding that it comes with an external microphone I am even more confused. Under the spec it states that it has

"Hi-Speed USB - USB Type A, Headphones -, Audio line-in -, Audio line-out "

Does this mean that it uses the Audio line in for the mic and not a mic in?

I read in one thread that a pre amp was needed to do this, is that correct? or can any mic be used with a line in?

Thanks in advance for any help.