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Old 05-01-2021, 07:22 AM
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crwilli crwilli is offline
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Join Date: Feb 2013
Location: Bluffton SC
Posts: 9,184
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As mentioned before, absorbing sound at 40Hz is extremely difficult. This article brings that point home.

https://www.acousticfields.com/how-d...-a-small-room/

I would suggest the addition of an external active crossover. Then you could set the high pass filter above 40Hz on your main speakers and locate your sub(s) in the room to minimize their resonance at 49 Hz. I have used a McIntosh MEN220 to good effect in an old system and now use a JL Audio CR-1 in my current system.

As an aside - There is little point in setting REW to sweep below 20Hz. What ever data you are seeing there is useless.
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