u/c0elbyte

Here in Denmark we have a supposedly DIY speaker guru called Troels Graversen. I must say his entire house is filled with speakers and components. And he does have the experience. Bought a pair of bookshelves from him and they sounded amazing.

But in an article of his he mentions that one cannot simply calculate a crossover by just knowing case volume and ports and drivers. Because like he says you need some special listening equipment with a microphone because the front of the speaker as in distance from the different drivers and also the size of the front and so on.
Is this true or is this just for high end builders. I just assume normal people like me couldnt tell the difference.