After years of practicing hopefully i could shed some light to those who are still not clear on them. It has got to do with pressure build up by your room itself. For an example if you walk out from a room to an open space your voice will sound open, less focussed and the loudness will be lesser as in comparison when you are in an enclosed space. This is a simple example on what a pressure in a room is causing towords our speakers when they are singing away and activiating or loading a given room. Of course speaker to room size ratio and thier placement is important as that will also determine how much of pressure zones will it activate in a room. Now what we are tuning here are these pressure zones. To give them a much more effective and organized way to work with our speaker and room itself. Pressure zones will be more towards acoustical space within the room itself and laminar flow are the pressure build up around the corners travelling along the walls of the room.
I tune them by using my voice which i hear and feel the resonance within me. Hearing a change of tone and openness in my voice dictates if the flow is moving away or concentrated in that one particular area. Now I'm not here to argue or prove myself at all. Bringing in physics and other methodological manner is not what im interested as what im doing is more than enough for me to understand and make it work for me. But what I would love to hear from others here is to give it a try by voicing yourself in your room and listen for the changes this itself should give you some idea on what is tuning all about. Now from what Michael has mentioned above concerning those simple cardboard excersises was exactly what I did a few years back which brought out a whole different way of thinking and mind set to me in this hobby.
Now onto what Bill has mention concerning on addressing mechanical and eletrical side this is another level of tuning that is equally important. I have removed most of my cable ties in my equipments that I can get my hands on and to be honest I was shocked with the improvments heard and it was a big improvment. As I said I came in with an open mind to what Michael has to offer and was very happy with the results. What got me thinking was how much of improvments I got just from listening to Michaels advise which was tottaly free. Of course knowing that he has such great depth of knowledge eventually gained my trust and of course I looked onto his products to augment my system more.

