Or better yet is there a 100' snake with phantom power? Can't seem to find anything online.
You should be able to push power through a 100' cable. A mic doesn't draw much current so wire size shouldn't be an issue.
Absolutely! Currently, we power all of our condenser mics with phantom power through lines that are over 300' long. The power required is miniscule, therefore the current flow to power them is also very small. The voltage drop is what will eventually cause the mic to stop working, but that will require thousands of feet of cable, especially at 48 volts, if that is the rating of your phantom power supply (can be 11 to 48 volts).
