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attenuation pad

Hi there I have a recording studio and i am using a stage box to take multiple microphones into one multicore to pl;ug in to my mixer in a different room. Because i am using a relatively cheap mixer, it does not have any attenuation pads. I was wondering what resistor sizes i would need to use and how i would wire up a switchable 10db attenuation pad for each of the mic inputs on my stage box. Also if i would like a LED to indicate if there is an input signal would this be hard to add to the circuit? Cheers Joe

Reply to
nottnick
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There are lots of calculators on the web to help you work out what value resistors you need, for example:

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You then probably want a DPDT switch (DPDT that's basically two switches in one) so that one of the switch poles collects the microphone to either the attenuator input or to a wire, the other pole of the switch connects the mixing desk input to either the attenuator output or the bypass wire.

o---------------------------------o / \\ / \\ from mic>--o o-----> to mixer

o--------------R2---------------o | | R1 R3 | | --------------------------------- GROUND

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gareth.harris
Reply to
Gareth

Thanks alot gareth, just what i needed! Any suggestions on the LED side of things?? Cheers Joe

Reply to
nottnick

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