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Having just received my speakers after a long stay at the Stroud spa, I've been fiddling with their position. I have fundamental modes at 28Hz (l= 6.06); 32Hz (w=5.24); and most notably at 73Hz (h=2.34).
There's not a lot I can do about the 28 & 32 modes, and they are not intrusive. I watched Ben Lilly's"Funkyjunk" acoustics video (recommended) and realised that I could harness quarter-wave LF cancellation (caused by out-of-phase rear wall reflections) to try to cancel or at least mitigate the mode at 73Hz. Placing the speaker baffles half a ceiling height from the rear wall (1.17m in my case) has worked wonders.
This formula should work with any cone loudspeaker in any rectangular room.
Have a try, and see what you think.
This is worth watching from the start:
There's not a lot I can do about the 28 & 32 modes, and they are not intrusive. I watched Ben Lilly's"Funkyjunk" acoustics video (recommended) and realised that I could harness quarter-wave LF cancellation (caused by out-of-phase rear wall reflections) to try to cancel or at least mitigate the mode at 73Hz. Placing the speaker baffles half a ceiling height from the rear wall (1.17m in my case) has worked wonders.
This formula should work with any cone loudspeaker in any rectangular room.
Have a try, and see what you think.
This is worth watching from the start:
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