I would recommend doing a little research and discovering a little about the science of sound. Or, I guess you could try and tell engineers, scientists, and educated hobbyists, how they’re wrong based upon your own emotions.
This interests me. If there’s a good article on this, can you share that? Otherwise, should it be higher or lower than 80Hz, or is it speaker dependent? Is this only for finding the ideal location, or keep the crossover the same even after placement?
Oh, you too? i don’t remember the exact model, but my 5 disc Sony was probably the worst piece of mechanical or electronic junk I ever owned! I ended up replacing it with a cheap Sanyo(!) that was better. Lol.