This is funny, this weekend I was talking to a friend of mine that is an electronic expert, telling him that he should build something like this. I would want one and if it didn't end too expensive he could sell some.
Having the Amp inside the control room to tune it is a great way of getting the sound I'm looking for, but having to move the mic inside the Recording room until I find the right spot isn't very practical.
It would be way better to control the movement of the mic(s) (as shown on this video) inside the Control Room while listening to the recorded sound.