Jump to content
Miguel Carretero

Line to mic level attenuator

Recommended Posts

Looking for some advice so I can plug a mic to any line level only input; there are different settings out there....

Using 10kOhm & 100Ohm resistors seems to be one of the most common but I am not shure if it is the right choice for me

Any help?

Cheers!

Share this post


Link to post
Share on other sites

You have not furnished the majority of information necessary to know your needs in order to do this properly.

A 40dB unbalanced attenuator can be constructed with the two resistors you listed if that's your goal.

Share this post


Link to post
Share on other sites
1 hour ago, Miguel Carretero said:

Looking for some advice so I can plug a mic to any line level only input; there are different settings out there....

Using 10kOhm & 100Ohm resistors seems to be one of the most common but I am not shure if it is the right choice for me

Any help?

Cheers!

Your subject title says Line to mic attenuator which is easily purchased in the form of an inline barrel. Shure make a switchable version. 

However, what is confusing is your question asks about plugging a mic into a line level only input. For this you need a mic to line amplifier which can be a battery powered box. Shure also make one of these. 

Other options are available like running the mic through a small mixer like a SD302 for example, to bump the mic level signal up to line level, then into your line level only device. 

Share this post


Link to post
Share on other sites

Thanks John seems that´s exactly what I´m trying to do. Just plugging a mic into the red cams line jack input i.e., or into any other line input. 

Sorry Peter I tried to explain myself easily but I don´t get it right often. I need to build the barrels on my own, no chance on using mixers or boxes

40dB would be the proper attenuation then??

Thx in advance

Share this post


Link to post
Share on other sites

Attenuate means make less signal... Sounds like you need to boost the signal of a mic to feed a line input. You've got it backwards.

Share this post


Link to post
Share on other sites

Thanks John; that´s a better idea

I would tell I need to place a 10kOhm on each positive and negative poles, and after then, just a 100Ohm across both.... but this set will change my phase... Is this correct?

Share this post


Link to post
Share on other sites

Probably no phase difference between this and the single-ended version, but keep in mind you have chosen not to include all the pertinent details that would make it easier to help you .  

This version of the pad would result in about 46dB of attenuation -- which would work fine with some line outputs and some models of Reds. 

Share this post


Link to post
Share on other sites

Yes, the (balanced) H-pad resistor scheme would not change the phase unless.. the R-1&2 get reversed between in/out.

OT: the forum's reply GUI is currently working, after being forked-up (again) for a few days

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×