If you acoustically treat the leg you should be ok.

80 Hz wavelength is greater than 4M.

Your 4 cm leg is not a concern for any subwoofer frequencies.

From the woofer‘s point of view, the table leg is non-existent. Has zero impact on the woofer.

Thanks all for the advices🤩

30 Hz wavelength is 37 feet. That leg won’t mess up those feet.

Mine is in the fireplace - which we never used anyway - and sounds better than anywhere else in the room. Do the crawl test…