it does not matter WHAT mics you use, when using the built in preamp to boost levels, you WILL get the weird beeping noise, it might only be on terribly quiet parts, but it will be there. I have 2 JB3s and it happens on both. did i just get unlucky? You are best off not using gain on JB3 and normalizing (or using Wavelabs ME Compressor without tweaking anything, it is the cleanest booster out there)... am I wrong here? people need to chirp in, but this is my experience, and once again, it does NOT depend on mics...