Nux Melvin Lee Davis Bass Preamp

This preamp sounds good, and works well. There is one BIG problem. It goes mad if you connect it to an XLR that has phantom power. Our UI24r allows phantom power on an individual input basis, so I wasn't aware of this problem, until, when playing with another group, I plugged it into their Yamaha mixer, which has a global switch for phantom power. As soon as you connect, the channel goes insane and starts making very loud coughing noises.