Hi,
Yes, it has the listen mic compressor circuit (it's actually a FET-limiter). I'm not sure if I still have the schematics....
This is one of the simplest 5k modules. It doesn't need the -25v line either, only +18/0/-18v.
The only control that's included for the limitersection, is an onboard trimpot for the threshold. You can wire this one to a pot if you want to, you'll need a 10klin pot for it.
Oh, and in case you want a line input : set the internal jumper to external mic, and put a U-pad attenuator in front of the input (which is connected to the Jensen transformer).
