How to connect a 2 poles lavalier microphone to a shure bodypack transmitter

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diko2

Well-known member
Joined
Nov 14, 2007
Messages
54
Location
VINCENNES France
Hi there,


I've got a Sennheiser ME104 lavallier microphone
http://en-us.sennheiser.com/me-104

It's a 2 poles microphone (but with a 3 wires cable don't know why).



I need to connect it to a Shure body pack transmitter
http://shure.custhelp.com/app/answers/detail/a_id/322/related/1

If i understand correctly i need to separate the voltage bias from the audio to connect it the body pack.

Something like this:
http://shure.custhelp.com/app/answers/detail/a_id/304/~/how-do-i-connect-an-akg-c410-or-c407-to-a-shure-bodypack%3F


It is right?

Can i go with to those values :
33uF  and 15kohms?

it's for vocals so i can live with a small High Pass filtering.

Thanks to all

Morgan
 
As far as I can see, the Shure schematic will work with your microphone capsule.
You might have to adjust the value of the 15K resistor.
A 'wrong' value may produce higher distortion, especially at higher SPL's.
 
Thanks a lot for your answer.

After some more research on the net i maybe found an other way to do this.

It seems that, at least, two microphone manufacturer (DPA and Point-Source Audio)  use only a resistor (2 or 3 k) between the bias pin  and audio pin to connect their mic to a Shure bodypack.

http://www.dpamicrophones.com/en/products.aspx?c=Item&category=138&item=24126#diagrams

http://www.point-sourceaudio.com/wiring.html

I don't kown about Point-Source Audio but DPA is trustable.

Can i go like this without the blocking cap?

If i can gain some space inside the tiny TA4F it's better for me!

Thanks a lot!

Cheers

Morgan


 
It depends on the input of the following stage if you would need the DC-blocking capacitor or not.
Personally I would use a capacitor!
Some of the '2 resistor' circuits look a bit strange to me, but I suppose there is a good reason to do it like that...
 

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