would a world class manufacturer such as Sennheiser produce a 25 ohm moving coil pressure microphone?
The Pleiades V6 battery powered electron tube pre preamplifier was connected to the 25ohm Grampian DP4 ie DP4/L and the big sound was hard to beleive.
And so detailed.
Almost no hiss.
If the V6 is that good the hiss origin would have been the 25 ohm thermal or electron agitation noise inside the 25 ohm voice coil wire.
Reference:
Pleiades V6 Schematic
Thermal of Johnson noise
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