It is a very interesting question, cathedral ceiling and Dunlavy 4.
I had never known it until I bought a Behringer deq2496. It also took me a week to spot root cause of the problem. However, I got a 20dB hump, instead of suckout, from 45 to 65Hz at listening position, 3.5' from floor. If I move vertically up to 7' from floor, the hump reduces significantly by more than 10 dB.
I had never known it until I bought a Behringer deq2496. It also took me a week to spot root cause of the problem. However, I got a 20dB hump, instead of suckout, from 45 to 65Hz at listening position, 3.5' from floor. If I move vertically up to 7' from floor, the hump reduces significantly by more than 10 dB.