Hi. Actually I wondered about it a some time ago. Some JBL and similar monitor speakers offer you this bass / treble treaming control on their speakers which I believe serves as a good control for speaker positioning. Many High End speakers have this inbuilt too but majority lack this substantial control. If the loudspeakers were equipped with such things ( frequency control etc. ) that would open many possibilities to adjust them in a home environment instead of reselling etc. Is this too expensive to implement or simply does not help so much...?