I have to admit that I never thought there can be a complex science behind speaker building.

Softwares made life easy for my generation and there is one for everything.I was playing with speaker building softwares for last 2 weeks and finally got into something real.MJK worksheet. Now there is all those plots that are staring at me. I am trying to learn what all those parameters mean or how the ideal graph should look like. What does all the terms in there means in terms of quality. I guess I need to learn some physics

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Is there any resources /books which will explain these Geometry parameters to a beginner.Especially various SPL plots and enclosure and baffle impedance principles?