Re: [Harp-L] Feedback?

[Vern <jevern@xxxxxxx>]

Every time I see a report on the feedback tendencies of a mic, I have the following questions.

Q. Why is the gain of the mic more important than the gain of the entire system including the mic and the amp?

It seems to me that the following things are important concerning feedback.
- The amount of sound (at each frequency) from the speaker that enters the mic.
- The phase of that sound with respect to the source and the speaker.

Q. How can that involve the mic unless it is allowed to affect the overall system gain which would affect speaker loudness?

Q. If the loudness at the speaker and the positions of the speaker and mic don't change, how can a different mic affect feedback?

Q. If the responses of two mics are different at different frequencies, could not this be corrected by equalizer controls?

Vern
  
 



On Apr 29, 2011, at 10:26 AM, Peter Madcat Ruth wrote:

> Another approach to avoiding feedback is to get a harp mic with a lower output.
> For decades I've been using a Shaker/Madcat Harmonica Microphone which has a much lower output than a bullet mic.
> This is an advantage rather than a disadvantage.  With a lower output mic there is much less problem with feedback in any guitar amp and no need to change tubes in your amp to compensate for a hot mic.
> 
> Here is a video clip of me (with the Big Joe Manfra Blues Band) using a Shaker/Madcat Harmonica Microphone:
> 
> http://www.youtube.com/user/petermadcatruth#p/f/2/fWs9vNdTBfY
> 
> At one miniute and 8 seconds into the video I leaned into the speakers and got my mic 6 inches away from the speakers to get one little intentional squeek of feedback...
> 
> Peter Madcat Ruth
> Musician - Grammy Award Winner
> madcat@xxxxxxxxxxxxxxx
> www.madcatmusic.net
> www.youtube.com/user/petermadcatruth
> 
> 
>