Hmm, when I said Oh Dear I was accused of “So less of "oh dear" patronising nonsense please.”
I think that interpreting one’s own system’s room plots can be tricky but trying to interpret someone else’s is fraught with problems which is why I would have to be very confident of someone’s knowledge, expertise and experience before posting my plots. Not to say that some of our posters don’t qualify but it is difficult to tell sometimes. As for me, I have many years of experience with tricky
speakers in a limited number of rooms. As for knowledge and expertise it would need someone with more knowledge than me to judge!
With our own systems, if we see something that looks a bit odd we can change one thing at a time, remeasure and compare plots and then listen carefully to see if the changes are audible to
us. Another problem is that the plots give the conclusion, so to speak, but don’t necessarily indicate the cause, particularly if more than one thing in the room is causing a problem unless of course you have a totally symmetrical room with no furniture and consistent walls, floors and ceilings. With any sort of fault finding multiple causes can make analysis challenging and frustrating. Inevitably, so many manuals illustrate how to diagnose a single fault at a time rather than combinations.