My sound system project is pretty scientific. I have a mic to measure sound pressure, a program RoomEqWizard to measure the response of the system. A parametric

My sound system project is pretty scientific. I have a mic to measure sound pressure, a program RoomEqWizard to measure the response of the system. A parametric EQ module to process the output against polynomial reductions. I also have a subwoofer box project. I modeled the response of my unit with a physics program WinISD. It incorporates properties of the subwoofer and the box to predict sound pressure levels. WinISD also predicts air velocity from the port, which if too high will produce fart noises. Farting is solved by making the port cross sectional area larger, and making the port channel longer to maintain the resonant frequency of the port. I have spent about $300 on supplies for the box. I’ll get a membership at a woodworking club to finish building it ($200/year, storage, tools, training). My 4.3cubic foot, 20-21Hz tuned sub box will enhance the response of the lowest audible 10-15Hz compared to the same speaker in a smaller box. It’ll fit nicely in my sedan trunk too. With respect to measuring response, an O(n) sine sweep can measure basic response. I’ve found many speakers can’t handle combination of bass and midrange, but can handle either or somewhat fine. I’m not sure how to measure this aspect. Maybe diff the original track from measured response somehow.