View Single Post
  #96   Report Post  
Posted to rec.audio.pro
Scott Dorsey Scott Dorsey is offline
external usenet poster
 
Posts: 16,853
Default APOLOGIES TO ALL: PIEZO TWEETERS DO SOUND LIKE ****!!!!

Phil Allison wrote:

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.

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.

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.

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. It is
one of the reasons why people praise transformer-input preamps without really
understanding why they are getting the sound they are, however.

On the other hand, that ringing on an unloaded or lightly loaded SM-57 is
a useful thing on snare mikes, to the point where people have removed the
step-up transformer from some SM-57s to accentuate the effect.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."