Nice job! How about a K40 Speech Processor / Astatic 575-M6 comparison? People rave about the Astatic but I find the antique K40 still runs rings around it from a audio output standpoint IMHO
The reason the RK 56 sounds better is because it is a dynamic microphone where is the Astatic mic is a static microphone. When you have a dynamic microphone you always have a wider audio spectrum and bandwidth with that you would a static microphone. How does the R 56K microphone compare with a power mic, that is my question.