Y
yepimonfire
Audioholic Samurai
Toole talks about this quite a lot, whenever there are two speakers playing the same sound, there is going to be a notch in the FR, if the speakers are 30 degrees apart, it's centered at around 2khz. Even in a normally reflective room, which alleviates some of the worst of it, it's still around a 3-5dB dip. Changing the distance between the speakers (closer vs farther apart) only raises or lowers the notch frequency, but it still falls smack dab in the middle of the speech intelligibility range and where our hearing is the most sensitive. https://www.audioholics.com/room-acoustics/room-reflections-human-adaptation/what-do-listeners-preferComb filtering?

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