Hi all. I had the following problem. I bought a Behringer UV1 mic preamp (similar to DBX 286s) and when I connect it to a razer audio mixer I get a constant loud noise. I've already connected it via XLR and TRS Jack 6.3 and it's still noisy. Moreover, this is not even background noise, but noise at the same level as my voice. If I connect the Behringer uv 1 preamplifier to my PC and connect headphones to it, the sound is excellent, but as soon as I connect it to a razer audio mixer, loud noise and interference immediately appear. I've already tried changing XLR cables - it's not the problem. I think it's the mixer that's the problem.