Can you make a wall "disappear" with absorption?

As I obsess over various ways to improve my space (crude floor plan attached), I keep thinking how nice it would be if I could put the mix position in the "bay window" facing the stone foundation wall (upper right), rather than against the back wall (top) where it is now. However, this obviously creates symmetry issues, since it puts a sheetrock wall maybe 5 feet to the left of the mix position and the nearest wall on the right side (also sheetrock) would be about 16 feet away at the bottom of the drawing. How realistic is it to imagine applying so much absorption to that left (top) wall that it effectively disappears, at least enough to solve the symmetry problem? Hope the question makes sense...thanks for your help.

Brian - If you cover the wall with 4" 703 you will wipe the wall out for all frequencies except the extreme low frequencies - Below 150hz. cheers john

Thanks, John. Will those frequencies below 150 Hz require some kind of tuned absorption? Or is that low enough that the sound is perceived as more or less omnidirectional and therefore symmetry isn't as crucial?

Or is that low enough that the sound is perceived as more or less omnidirectional and therefore symmetry isn't as crucial?

yes :) cheers john