Mic PreAmp for ModMic 4.0 necessary?

Since it was recommended and (for what I can tell) has good stats, I bought the Antlion ModMic 4.0. I can't complain about the sound quality and was quite happy with it. Since I actually used it to speak to friends on Teamspeak...

This thing is quiet! 
I have done everything I could to make it louder, put it in rear port, maxed out volume and amplification, reinstalled the latest driver. It is still pretty quiet. (The FAQ page from Antlion is a joke by the way).

I only see two options left:
-buy an expensive soundcard and hope the have Mic amplification
-buy a Mic preamp

Any suggestions?