I have a Peavey PV6 USB Mixer and a Audio Technica AT2050 microphone that uses phantom power. It all worked great. Later I decided to add a compressor and got a 2nd hand dbx 166XL (verified that it works). Then I realized the PV6 doesn't have insert.
I tried running it back in through the EFX Return, but that didn't work as it mixed the compressed and uncompressed sound together (at least that is what it sounded like). I tried running from the mic, through the compressor, to the mixer. I got no audio. I realized that the TRS (1/2" jack) I was using doesn't support phantom power.
Before I go and pick up an XLR cable, I thought I would check to see if the phantom power can pass through the compressor. I don't see anything in the dbx 166XL documentation about this, so I am asking here.