The lower the bias voltage the lower the value of resistor at 3.8 volts via the R09 the correct value is 2.4k I have measured it for THD and that gives the best balance of signal output and the least amount of distortion. Now at 7-9 volts the best resistor to use is 4.7k.
This post is great Chris, thanks!
When I had illconditioned 2.2ks and a pair of your 4.7's, I found applications in which they both performed well...
There isn't just a general rule that 4.7k or this or that is the best. Each manufactures make and model will perform differently based on the resistor/load.
I would trust Chris to test my particular brand of mic and determine the best electrical solution. I have had multiple pairs of MKE40s that behaved differently than one another.
I know many of you don't appreciate guysonics sales tactics or website, but he seems the understand this concept too. His mics are designed specifically for the voltage and load of a particular microphone input.
It just doesn't seem that the standards for PIP and consumer mic/line inputs are conducive to predictable performance