I bought wood blocks to raise mine. Mine are 8020s, but I wasn’t able to find a practical on-the-market solution to bring them to ear level.
It’s a bit different since yours are larger, but I have quite a bit of drop-off in sound when not placed just right and the 7040a sub was a must.
Hopefully you have an easy option for custom wood blocks (if you go that route). Manhattan (NYC) is a weird place to go wood shopping, so I bought “blanks” from Etsy not understanding that what I bought was untreated walnut blocks covered in wax, as they were made to be used with a lathe to make bowls.
It became a little project, sanding smooth and applying oil immediately so they wouldn’t crack, then several more layers + drying before I could use them.
I saw it on day one, thought “ha! That could be funny”, but then couldn’t be arsed for three days. Got a sudden burst of the old thread dickhead energy and here we are, successful derailment via bad picture cropping.