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Worth correcting a -12db 75hz vertical bass null 12 inches above my listening position?

Mort

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My only LP is a chair in a 10x12 room. The room has created a significant vertical bass null around 75hz that is -15db or so and about 12-16 inches above my ears at the LP. Dual sub relocation didn't easily remove it and I only have so many sub location options in this small packed room. It does not seem to affect my listening, except when I stand up which is not often and of little concern.

The orange is LP at ear height. The blue is at LP but 12 inches higher than the orange measurement. You can see the dips.

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By the way, It's fascinating to actually hear a base null, which I can do playing a 75hz wave and passing through the 4–6-inch null that appears to go across the whole room. It's a weird sound and sensation.

Should I just leave it? My thinking is there is not much advantage to fixing it, even assuming it can be fixed as bass nulls are challenging.
 
First thing I would do is rescale that graph to something reasonable. Convention is to have the Y-axis cover 50-60dB so we can more accurately see what the actual signal is doing instead of mostly empty space.

But more to the point, as you already stated bass nulls are tricky to fix and it's not present at the position you actually listen in. If you want to chase it down for the sake of learning more about measurements, EQ, sub positioning, etc. then go nuts. If you just want a good experience then I would ignore it as it isn't affecting your listening experience unless you actively go looking for it.

You could try adding a third sub to your already packed room. :p
 
Personally I wouldn't worry about it since it's not present at your listening position. The room is going to have bass nulls somewhere no matter what you do. Just be glad there aren't any at your main listening spot.
 
Unless you have guests who are 24-32 inches taller than you, it doesn’t matter (to maintain the 12-16 inch delta once seated).

What you are seeing is best thought of as a shadow or column at a theater. If you can see the stage, you are fine. If the column is blocking your view, you need to do something.

When correcting to your main listening position, you can do a few positional checks in a much tighter area to see what you are experiencing. Only someone with a listening position 12-16 inch above you will run into problem.
 
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