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How to identify Room Modes by measurement

Olli

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#1
I am looking for the optimal XO point for Subs. This is why I new to check for Room Modes. Unfortunately my room is totally non standard in its dimensions, so a Calculator W/D/H won’t help. Is there a way to identify Room Modes by measurement, preferably with REW?
 

MediumRare

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#2

RayDunzl

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#3

Hipper

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#4
What I did was draw a shape on the graph. Say you want to draw a rectangle. Find a starting point, left click and hold down whilst drawing a line on the graph. When that line is complete release left click. Then draw the next line.

You can make any shape including angular lines but not circles.

Where you go from there I'm not sure. Click on '?' for more clues.
 

RayDunzl

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#5
It didn't like Chrome here...
 

MediumRare

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#6
You might need flash.

Next step, click on speaker to place your subwoofer. Click ear to place the listening position. Then you can select the main reflections or all reflections.
 

Willem

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#7
Just get a measurement microphone like the UMIK-1 and measure what is really happening. You will likely be horrified.
 

ernestcarl

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#10
Just get a measurement microphone like the UMIK-1 and measure what is really happening. You will likely be horrified.
LOL. That was my impression at first, too. The awful truth is hard to accept -- in the first days and weeks -- then you later find yourself saying: "well, it's really not all that bad... maybe we can improve things a bit."
 

pozz

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#12
Room modes (which depend on the room's dimensions) can't be fixed with room EQ, although those with irregular shape as the OP described have less chance of standing waves.

As @Willem said, measure and then adjust as needed.
 

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