well if I am recording "on the fly" then I take a line from my m-audio fast track headphone into my mixer than a line from my mixer to the line in of my soundcard and bingo
Generally I use headphones though cos the condenser mic is a tad sensitive when it comes to speakers. when I am recording this way I plug the speakers into the mixer
when recording on seperate tracks then the headphones are plugged straight to the soundcard and the condenser into a seperate pre-amp and I bypass the mixer altogether