Most - maybe all - professional microphones will not work outside of the 6k8 / 48V specification, specially when they do not have output transformers. These resistors are often considered as a part of the microphone circuit. I would not speculate anything else.
lohk said:
Speculations aside 😉, in addition to the case of mics with no DC converter for capsule bias I mentioned before, anything other than 48/6.8K won't work properly with mics based on so called "Schoeps circuit", where as you rightly notice, the 6.8K resistors are the part of the circuit.
Most of other mics should be fine with 24V/3.4K as in any case their internal voltage drops to 9-12V.
Well I finished the prototype mic pre, and I'm fairly pleased with it, considering it's simplicity.
Max gain 35dB, 0.05% THD, -74dBc noise.
Min gain 13dB, 0.005% THD, -95dB noise.
Good enough for rock and roll anyhow!
Max gain 35dB, 0.05% THD, -74dBc noise.
Min gain 13dB, 0.005% THD, -95dB noise.
Good enough for rock and roll anyhow!
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