Signal path, setup:
AKG D 1000 E - Pleiades V6 - Sony TC-D5 Pro - Sennheiser HD 580
It sounded great.
But only when the low cut of the mic was on.
When the mic was at position B and the low cut was done by the Input transformer of the V6 there was an unfocused mid bass haziness that reminded what happened when the Sennheiser MD441 U3 (the version without low cut option) was connected to the V6.
Then it was decided to insert Pleiades filters between the mic and V6.
Again the sound left something to be desired and the internal low cut of the D1000 made a much better job.
So it seems that although Pleiades filters do a great job of removing all that bass heaviness due to proximity effect the core must be somehow overload by such a great excitation current.
The BBC 1:18 transformer described on the MD441 U3 to V6 post was also connected between D1000 and TC-D5. There was proximity compensation because of the low primary inductance. The sound was nice but still the mid bass was fuzzy. Possible core saturation?
The filter inside the AKG is implemented in a great way. Is it the core material used. The resistance of the winding? A series see sister with the winding?
By looking at the D-1000 data sheet there is a series resistor with an inductor for the M(medium) position. For the S (Sharp) position there is an other resistor in series with an inductor in parallel with a capacitor combination.
Pleiades filters may need to be improved.
On omnidirectional mics the sound is almost already there as there is no proximity effect. This possibly explains why they are so clear on vocals.
Can one become fair with directional mics?
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