I have a pair of phantom powered small diaphragm microphones. However, they output unbalanced signal (pins 1 and 3 are shorted) and I've had intereference / whine on my output. I am considering to purchase a DI box to make the signal to the mixer unbalanced and more resilient to external offending radio waves.
Question: Can I expect the DI box to provide the phantom power also to the microphone it is connected to (while itself being powered by it as well)?
I've searched the web and read the manuals of some products but haven't found anything so far.
I'm using low-end t.bone EM 700 microphones and a (rather versatile) Behringer mixer FX1622. If I swicth off phantom on the board, the mics go quiet. On the mics, pins 1 and 3 definitely connected to each other, tested both with multimeter (I guess the mixer possibly detects this). If I google "phantom power wiring", one can see that Phantom power is applied to pins 2 and 3. My guess is, the mic uses just two wires. DI box has two jobs: converting line level high impedance input to mic-level low impedance input AND converting 2-wire unbalanced input (from the device) to 3-wire balanced output. Since my mics apparently use 2 wires only, I had hopes it could also pass on the phantom voltage.