Only for the trivial cases. You could tell if the speaker is placed in a drastically bad place, ie it sounds bad everywhere, but you wouldn't be able to tell i

Only for the trivial cases. You could tell if the speaker is placed in a drastically bad place, ie it sounds bad everywhere, but you wouldn't be able to tell if the speaker sounds good where the listener is. For that you need to put a microphone (which itself would need to be of relatively good quality) where the listeners ears are. Even with measurements like that, it's pretty nontrivial to compensate for it. It's technically a proven problem[1] (solvable for some convex shapes) but its a little more complex than just adjusting the volume or phase of a given frequency. A room -and by extension all the little nooks and crannies of a room- acts as a resonator, and will gather and sustain notes. You need to counter that sustain ahead of time. 1: https://en.wikipedia.org/wiki/Hearing_the_shape_of_a_drum https://en.wikipedia.org/wiki/Hearing_the_shape_of_a_drum