Audix TM1 Test and Measurement Mic

I purchased three of these microphones with matching windscreens for use in a Decca Tree recording situation. Of the three one had a bad circuit board which Audix replaced immediately. Over time I started noticing what seemed like higher levels of self noise & degrading performance that I have never experienced with another microphone. I have used these mics in a wide variety of field recording situations including drums, acoustic guitar, piano, & orchestral strings. The reason I purchased these mics is because they are accurate small diaphragm omni mics at a reasonable price. They have a very clear sound without any coloration & this can be quite nice depending on the circumstances. The wind screen design is probably the best aspect of this model -- it screws on tight & works perfectly. The TM1 is a finicky model & when they want to work, they are good but after two months of use I can say the self noise is too high for my purposes. After another of the original three I purchased developed a capacitance issue it started popping randomly while in use. I sent it to Audix for repair & they returned it within a couple weeks with notes on how it was repaired. After testing it in the field, it was evident to me that there was no repair & the issue was still present. Overall, Audix's customer service is really good but I do not think this is a quality product. I have written reviews for several microphones & have yet to have any comparable quality issues. If you need a clear-sounding small diaphragm omnidirectional mic I would recommend saving up some more cash & purchasing a Shure KSM141. If you are in a total rush & need something inexpensive that will work, grab a DBX RTAM. I have used other Audix products in the past but I would not purchase the TM1 again.