Off stage amplifier diy solutions (Radial SGI like)

[lionsberg]

I would like to have my VOX AC30 off stage so I can crank it up and mic it. To keep my signal strong I would like to use something like a Radial SGI or Blackeye effects Imperium. Both of these solutions are supposed to keep your signal strong and convert your unbalanced, high impedance guitar signal to a low impedance, balanced, XLR signal at your pedalboard and do the opposite at your amp. This way I should be able to run 100ft of cable between my pedalboard and my amp.

I would really like to build something like this myself because I am not really prepared to pay 200 euro's or more for one of the options mentioned above.
The problem is: I'm not sure how to go about doing this. Maybe someone else has done this before.

I've been using a diy buffer on my pedalboard for quite some time to keep my signal strong and I figured I might be able to transform a buffer circuit into a send box for the first part of the system. I'd like to hear your thoughts on this

Edit: this was supposed to go into the open discussion forum