resistor mic splitter

I'm building the splitter precisely for the situation You mention, to split the mic signal of a singer to the house P.A. and to a recorder with its own mic pres

thanx a great lot for your reply

hope this thread proves to be useful to more people

question:

if I want to have more outputs in series after the 600ohm resistors, will it work because the microphone is still just seeing the 600ohms or should the design be changed to accomodate the extra outputs?