These mics are incredibly common and they are a very inexpensive entry level mic that have gotten many musicians and engineers started. Eventually, many will outgrow this mic and it will be pushed to the back of the mic cabinet. It’s time to bring it out and give it new life! The 990 is a great mic to upgrade. Despite its low cost, it is mechanically built very solid. When we’re done with it, you have a very solid professional mic that you will find many uses for. Have questions? Contact me!
We replace the small (24mm) MXL capsule with our Brass Ring K47 Style Capsule. We replace the MXL Schoeps circuit with the 990 version of our own jaSb circuit. Our board uses high quality, low noise components throughout and unlike some other DIY or upgrade boards will perform perfectly over a wide range of Phantom Power Voltage.
We can build the circuit with or without the optional internal pattern switch. We highly recommend upgrading the headbasket to the the improved one from microphone-parts.com (the same great people behind Roswell mics!). This gives the mix a final polished professional look and eliminates some of the problems with the MXL headbasket.