i may not have explained in the best way, but dogmusic got it.
some churches have a great modern mixer, some have a tiny mixer, some not even a "rec out" connector, and some does not even have a mixer or usable sound system (one once had a very very old wooden box with mic's input, a volume knob, and speaker connector. THAT'S IT. nothing else.
so, as even the ancient systems use the standards mic's connectors (XLR or TRS), i realized the only way to guarantee i will be able to get the audio in any church, is to get the audio from the mic's itself.
but, of course, i also need to send the mic's audio "i stole" to the church sound system, so my idea of using the 70D recorder to get individual recordings of each mic (a must for me) and also send each to the church sound system (also send individually)
but, now you guys mentioned mic splitters (something i didn't know existed) looks like another option. i found locally only a few models, not cheap, but is a good option
one thing: as the splitter uses a tranformer(passive ones) this will cause a few dB drops, correct? as any transformer, it have some resistance added directly to the signal, right?
also, second thing: if splitters use a "audio" transformer with 1:1 ratio, its not the same kind used in DirectBox devices (from 150 to 600 ohms)? cause it's way cheaper to get the transformers from DI Boxes....
thanks again guys for the help