Apple Logic Pro /LogicExpress Discussion

I still keep an old Lexicon reverb just for tracking. I have logic 
going into a mixer, and then the mic going directly into the a/d but I 
take another output from the preamp into the mixer too and route it 
thorugh the reverb. then the singer listens to headphones attached to 
the mixer - getting a blend of logic and himself/herself. there is 
absolutely no delay for the singer to hear himself that way.