Several people have emailed about the XG1 and results. For those curious the MDS for the K2 was -134 dB, for my TS-830S it was -133 dB and my Corsair (model 560) it was -125 dB. Of the three the K2 has the most intelligible audio for either cw or ssb. It is nice to have dependable numbers to attach to each rig. 73 Allen