Anybody here know how to make audio pads? -20dB, -50dB etc. I need to make some with XLR cables too attenuate mic level signal.


Thanks

 

Hello,

You can use either PI ot T attanuators for this:
http://chemandy.com/calculators/pi-attenuator-calculator.htm
http://chemandy.com/calculators/t-attenuator-calculator.htm

More calculators like that can be found on this page:
http://chemandy.com/calculators/calculator-index.htm

Bertus

 

Great thanks for the websites. Do you know which pins of the XLR gets the resistors for the T pad?


I assume

pin1 R1 pin2
pin1 R1 pin3
??? shunt ???

 

http://www.clarkwire.com/PinOutXLRBalanced.htm

 

Thanks for the link Kermit but I need to know which pins are represented on this diagram.

 

Hello,

If the signal is balanced you will need an H or O attenuator.
Here is an example for T and H:
http://www.csgnetwork.com/decibelattenuatecalc.html

Bertus

 

It's a balanced signal XLR to XLR Mostly to pad line level to mic level

 

Hello,

With the given calculator you can create the attenuation pad needed.
What you need to know is the input impedance, output impedance and attenuation.
For example input 600 Ω, output 10 kΩ, 20 dB will give you the following circuit:

This page from the wiki shows you some theory behind the attenuation pads:
http://en.wikipedia.org/wiki/Attenuator_(electronics)

Bertus

 

I finally found the pinout

http://www.uneeda-audio.com/pads/
At the bottom of the page


Thanks guys for the replies!!!