[Phil Allison[_4_]]

Scott Dorsey wrote:

Phil Allison

The problem is that microphone noise and microphone dynamic behaviour
due to
electrical damping (in the case of dynamic mikes) are usually much more
important than any HF behaviour.

** Sorry, that is gobbldegook.

Okay, here we go....

A lot of dynamic microphones, most especially the SM-58, rely upon the
load to provide mechanical damping of the capsule.


** Resistance loading on the output *only* affects the LF resonance of the diaphragm and even then not by much.


If you operate them into a high-Z load, you see all kinds of ringing and
overshoot, because the diaphragm becomes a poorly damped mass-spring system.


** That is nonsense.

Capsule inductance combined with the leakage inductance of the internal transformer plus any cable capacitance form a network that can ring at specific frequencies - normally supersonic ones.

Adding the right value load resistance will damp this nicely. If Shure thought it valuable, they could easily add a resistor ( or RC combo) inside the mic.


These microphones need a fairly low impedance load in order to avoid ringing.
That being the case, the load impedance across the cable means that cable
effects are pretty heavily minimized.


** But we are considering *unusually long* runs where cable capacitance can be a devil.


Alluding to your superior knowledge of god knows what is a sure way to **** readers off. Being very specific is far more useful.

This isn't any superior knowledge, this is pretty commonly known.


** But instead of posting like you have now, you *alluded* to it.


..... Phil