Tinny sounding electric miss on uBitx

Mike Lichtman
 

I was trying various electret mics with my uBitx today. Most of them sound very tinny lacking midrange and bass. 
This raises several questions: 1. is it me or do others find the transmitted sound is tinny when monitoring in another rcvr?
                                                 2. Short of an equalizer on the mic input what can be done? A cap, if so what value  .05 ? and where?
                                                 73 Mike KF6KXG

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