Okay, lets go for some clarification here. Yes, indeed, all mics need preamps. Teh question, I believe, is whether or not your mixer needs seperate mic preamps. I would imagine that unless you have a line mixer your mixer has mic preamps. Now, it may have either balanced XLR pres(3 pin plugs), balanced TRS 1/4" pres or unbalanced TS 1/4" pres. The real question is are they quality pres or not. Now, if all you have is 1/4" pres you will need a cable that goes from normal mic XLR to 1/4" plug. If you have unbalanced inputs this will be easy to find at any music store. If you have balanced 1/4" TRS jacks then you need to get a cable that goes from XLR to TRS 1/4". Not impossible to find, but you may have to special order it from your favorite music store or have them make you one. Now if you are using a small or large condensor mic that does not have it's own power source you will need to have a preamp that supplies phantom power. Many of today's mixing boards will have this feature, but not all. So search your mixer and/or manual for phantom power.
1. What, it doesn't have it? Now you need to buy a separate power amp that has phantom power or a separate phantom power source (and yes, these do exist).
or
2. What, it does have it? Well there you go, get to recording.
I hope that clarifies the situation for you. If not clarify your question a bit more. Like what kind of mixer you have, what type of mic is the 14L Prologue.
Peace, Jim