Speakers that can be placed close to the back wall


Downsizing and need ideas for speakers that can be placed close to the back wall. New room size 20' W x 15' L x 9' H. Have lots of power to drive the speakers.
seadogs1
Harbeth P3ESR or Spendor 3/5. Had both and no problem. They are both sealed!
I really liked the Jordan JX92 based wide baffle transmission line speakers when placed close to the wall (I owned a commercial model the Konus Audio Essence) but there are plenty of DIY plans out there if you have the skills or wish to have a pair built for you