Okay, so I decided to get the MIT's.
Are these what I'm looking for?
http://cgi.ebay.com/HOSA-MIT-176-Mic-Transformer-XLR-Female-LO-Z-1-4-M_W0QQitemZ7408320514QQcategoryZ23783QQcmdZViewItem
That's them, yes. Hopefully they'll give you enough gain, though ScottT's account suggests that may not be the case. Depends on how loud the sound source is that you're recording.
http://www.music123.com/Hosa-MIT176-i13238.music
Is that what I will need? Those will run from the Phantom into the JB3?
The JB3 has a 1/8" female stereo connector. So, whatever gear is immediately upstream of the JB3 needs to have either <1> an 1/8" male stereo connector, or you need adapters between the upstream piece of gear that converts its outputs to an 1/8" male stereo connector.
For example, if you run mics > Art II phantom power > JB3 (which probably won't provide enough gain, but for the sake of example let's continue). The Art II outputs via two male XLR connectors. So, you'd need an adapter cable between the Art II and JB3 that has two female XLR connectors on one end, and an 1/8" male stereo connector on the other end.
Like this:
Another example, if you run mics > Art II phantom power > Hosa MIT-176 line transformers > JB3 (which may provide enough gain...hopefully). The mics, Art II, and Hosa MIT-176 will connect just fine, but you'll need an adapter between the MIT-176 and JB3. Each MIT-176 terminates in a 1/4" male mono connector, so you'll need an adapter between the MIT-176 and JB3, specifically an adapter with two 1/4" female mono connectors on one side, and an 1/8" male stereo connector on the other.
Like this:
