Jeff9329 wrote on 7/11/2016, 4:13 PM
The Senn G3 with the right output cable will work fine on the G3 end of the equation. Some of my old cameras used a mini jack rather than XLR.

However, I bet you are going to have to either fabricate a cable or buy some type of adapter. Only one of the contact points (and ground) are going to be for the mic input, Im sure its standard, but dont know which one.

Hopefully a iPhone person will step in.
Grazie wrote on 7/11/2016, 4:30 PM
I've used this. It gives preamp, XLR Connectivity and much on s/w side:

rraud wrote on 7/12/2016, 8:44 AM
I have no idea how an iPhone's input is wired, but would assume it's unbalanced mic level. The G2/3 EK100 portable receiver output connection is unbalanced with a 3.5mm TRS jack. T=hot S- shield/ground, the ring terminal is floated. The output level is adjustable from a low mic level (-60dBu) to around -10dBu (line). So there's not much sense in going from unbalanced> balanced> unbalanced.