In my practice I obtain very high accuracy of simulations, so I am sure my simulators should give you very good simulations of reality but there are two conditions to fulfill.
First condition is on my site. This is software without bugs. I put in a lot of effort to make sure there were no bugs but I am only a human. So please do not trust my simulators without being vigilant.
Second condition is on your site. This is your engineering skills. You have to learn give simulators correct data and correctly understand results of simulations.
And to check both conditions I have prepared functionality for this purpose. Using simulators you can set option "with another measurement" in "Comparision" section. Then you can compare results of simulations with measurement from real life.
At the begining I propose you to make measure of one speaker directrly and with one element in serial. After that simulate this speaker with this element and compare with second measure. Plots have to be identical. Next you can do it again with more elements. If you get good results you can start to work.
In any case of problem you should isolate which one of element in real or in simulator gives a problem and if you sure there is a bug, you can email me to let me check simulator.
Naturally, the accuracy check is only possible if all measurement conditions are maintained, as is the unchanged setting of the speakers and the microphone as well as all electrical conditions.
Simulators