In Line active Filter Design…

[Microphoniste]

Rycote has been selling This (and other) 017022 - Cable with TAC!T Filter… a discontinued item…

An “in-line, active, 18dB/octave low-cut filter with a 'knee' at approximately 60Hz”. It was connected in-line between a condenser microphone and the mixer or recorder.

I suppose this one could work with all condenser mics as it was an active design!??? But still wondering how to achieve it!

Anyway… has anybody here built such an active inline filter? This would be interesting for sennheiser mkh8030 that go very very low…

Warmest regards

 

[Khron]

I wonder how you can get a DC-coupled high-pass filter...

 

[Microphoniste]

I wonder how you can get a DC-coupled high-pass filter...

It says: “
The Tac!T filter draws its power from the P48 phantom supply while also passing power on to the microphone. It is electronically symmetrical and does not disturb the intrinsic balance of the microphone circuit, nor does it introduce any signal loss for normal programme frequencies.

A key feature of the Tac!T filter is that it fits entirely within the body of a Neutrik XX-series XLR connector. It is not switchable, and the electronically buffered circuitry ensures that its performance is consistent for almost all phantom-powered microphones and preamplifiers in general use.

Tac!T is a fully symmetrical balanced 3rd order filter. It has a DC path through, so that it can couple phantom power as well as signal.”

 

[Khron]

It says

Sure, because EVERYTHING that someone who has something to sell you, is 100000000% true and accurate, and in no way dishonest in any way, right? I mean, that NEVER happens... 😁

But i guess a couple diodes from the output side to before the DC-blocking caps might just do the trick...