John Reekie from couldn't summarize in better details the steps involved in setting up a miniDSP system for a wide range of applications! From subwoofer tuning to 4way crossover, his detailed reviews take the time to explain the complete process from setup to measurement of the system, including diagrams and measurement results. For more info, have a look at HifiZine website at the following links: 

miniDSP 2x4 for Subwoofer equalization

miniDSP 2x4 for 4way Open Baffle project: Part 1 , Part 2

miniDSP 2x8 product review

PWR-ICE for the miniConvertible

nanoAVR HD review