Dayton Omni Mic Measurement Microphone with Dayton Omni Mic DVD

Checking out the Dayton Omni Mic DVD with the Dayton measurement microphone, to see if it provides a more accurate frequency response than online YouTube frequency sweeps.

I'm trying to establish where I'm at with the woofer bass response, the bass reflex port response plus the midrange and tweeter response, on my DiY speaker project.