Here is an excerpt from a physic forum talking about sound waves that pass through each other
Interestingly, the meeting of two waves along a medium does not alter the individual waves or even deviate them from their path. This only becomes an astounding behavior when it is compared to what happens when two billiard balls meet or two football players meet. Billiard balls might crash and bounce off each other and football players might crash and come to a stop. Yet two waves will meet, produce a net resulting shape of the medium, and then continue on doing what they were doing before the interference.
It seems from the above that meeting waves pass through each other, changes the shape of both waves and then once through, the wave reverts back to the original shape and path.
This is my understanding, yours also?
If this is so, I can install two more speakers that will cross path with two others and all will be OK. Oh, happy day.
8.3 Surround, protected by APC H15
Speakers: SpeakerCraft: 6 AIM8 Fives & 2 TIME Fives used as Wides
Woofers: SVS PB13-Ultra (1), HSU MBM-12 MK2 (2)
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Oppo UHD-203 player, Denon 4311CI, Harmony 1100, Harmony Elite, 9 Noctua cooling fans