I'd like to use an Audiomoth Dev with an external hydrophone. Most hydrophones with a single-sided pre-amp require at least 3 v power in a 3-wire system (ground, power & signal). However, the 3.5 mm external input jack on this board is designed for a 2-wire plug-in-power pre-amp. I'm testing the Aquarian h2a hydrophone which uses plug-in-power, but it is not as good at low signal levels as the HTI-92-WB hydrophone, which requires 3-wire power. Can anyone tell me if it is possible to modify the existing 3.5mm socket to provide phantom power to a 3-wire system? If not, this would be a good option for future versions of this device.