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How do I build an active Direct Injection Box (D.I)?

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cosmox

cosmox

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Hi all!

I´m trying to find info on a little project I have started to get rid of the noise in some cables in my studio.
First I got an passive box (a cheap one) but noticed that it filters some frequences in the sound (mostly the low register)
And dosen´t sound verry good in general.

So I have thought about designing my own active D.I instead.
The thing is that I´m not shure how to get the GND-Lift to work if I put a bufferstage on the output.

Anyone got any ideas or experience in this?

Thanks, Hampus
 

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