Question: How do I test the amount of noise added by a mic preamplifier? Answer: First you need to terminate the input of the mic pre by connecting pins 2 and 3 together.  This can be done with a paperclip...

A number of users of the Mic Pre One and the Mic Pre IV have asked the question: "If I have the Gain control turned all the way down, how can the mic pre still be peaking? If I engage...