I recently purchased 2 Compacts. When setting them up, I noticed one is much richer and warmer than the other. Test was done using the same mic and switching from one Compact to the other, set exactly the same. Test results were confirmed by 2 fellow pro engineer/musicians. So, I returned the weaker sounding unit, and got a new one. The new one sounds just like the one I returned, not as warm or rich as the one I returned. Have any changes been made to the model that would make them different? Otherwise, I know this does not seem to make much sense, that's why I'm here asking for help! Thanks!!