Audix TM-1

After living with this mic for a couple of years, have to say seems to be holding up very well, and have had no issues with it. Was surprised to see a loudspeaker manufacturer using this microphone (admittedly an array of 10 of them) over a more expensive b an k option during some beta test work, and have been using this in combination with Systune to tune, and monitor audio systems performance and sol during several tours. The mic is reliable and rugged, and hasn't measurably changed it response since purchase. Think, as well as reference work, a single or two would make fabulous flat frequency room mics as the omni pattern and the flat response might get a very interesting view of the room

Noisy microphone, without a calibration file.
Between work, I forgot to send it back. It is noisy for audio recording and no calibration file for measurement.
I do not find this mic suitable for recording as a room mic due to the noise. For Louder sessions it can be ok. Yet, to record quiet sources or ambient it is noisy.
I'm not saying it is completely useless without calibration file. But, I do not understand why there is two versions of this and why we cannot buy calibration file afterwards if it costs money. They could sell one version and we should be able to buy the calibration file afterwards if we want in sake of convenience.
So, in summary; this is not the worst mic or completely useless. However, you should be careful if you want to do things by book.