The Mann microphone company was conceived in 1992 by a group of audio engineers and technicians in order to create a small range of special purpose tube microphones not commercially available at that time. An intimate knowledge of vacuum tube characteristics and idiosyncratic behavior between tubes and audio transformers led to a number of innovative designs built as one off models for particular projects. The MT91 has been widely praised not only for its sonic quality but also its versatility. Stringed instruments, female vocals and the subtleties of adding soloists to an orchestral recording without distracting harmonic aberrations, are made an uncomplicated activity.
Robust mechanical construction coupled with classic broadcast condenser design makes this uniquely versatile general purpose condenser microphone a us... 
When it comes to designing a large format condenser microphone, a good result represents a thoughtful balance of many potentially conflicting issues. ...
