What impedance converter (head amp) are you using?
What polarization voltage (bias) are you using?
What preamp?
It is more of a relative observation. A Chinese K87-style capsule with exactly the same circuit gives a hotter output, requiring 11 o-clock on the gain.
Headphone amplifier: Behringer DX2000 mixer
Polarization voltage: 72V from a Jules' DC-DC Hex multiplier
Preamp: OPA Alice (OPA1642) phantom powered.
I'm pretty suspicious of the membrane resistance which is a few ohms per cm2 as the culprit. So any suggestions for more conductive aluminiumised Mylar would be greatly appreciated!
