They may require something called "plug-in" power, which is different from phantom power. If you're using a recording device, there may be an option to turn thi

They may require something called "plug-in" power, which is different from phantom power. If you're using a recording device, there may be an option to turn this on. This is common for lav mics, so it may be true for yours too. As an example,if you have something like a zoom h5 recorder it's available through the menu system. It's also possible that you need an adapter that converts the plug from TRS to TRRS or vice versa. (Simplified: Count the number of "stripes" on the plug, if there are 2 you may need an adapter to convert it to 3, or the reverse)