Linkwitz Mic Preamp variant
been experimenting with some sound recording, and the measurement microphones described by Linkwitz:
Linkwitz Measurement Microphone
Linkwitz modifies the mic capsules to configure the FET as a source follower. I happened to have an INA141 instrumentation amp that I was wanting to use, so I built a preamp using it. Instead of configuring the FET as a source follower, I divided the resistor in two, and made it a phase splitter. I AC coupled the two signals to the inputs of the INA141.
This works fine, it's very quiet and sounds OK. I haven't been able to perform any detailed measurements yet. It would probably be better with a different IN-Amp, such as INA217, but this is what I had on hand.
My question is: is there anything inherently wrong with this approach? Specifically, is it going to be less linear than the source follower configuration? Is it going to generate more noise? Is it going to clip more easily than the source follower?