If you MUST put speakers against the back wall, Larsen is the speaker for you. They are designed for that role and do it very well. If you wish to put your OB speakers (I have maggies and Linkwitz) close to a back wall, just hang a rug, curtain, quilt, or tapestry about 1 inch from the wall (attach the fabric to a 1x1 screwed into the wall) and place the speaker a few inches from the fabric. It can be a "hall runner" or something wider. Thick, fuzzy rugs work best. The speaker's stand projects at least a few inches front and rear, so you can push them up to the wall. If the room is wider than deep, turn the speakers 45 degrees to the wall (aimed at you) so the back wave reflects off the back wall and bounces off the side wall before bouncing back to you. That lengthen the path of the back wave. Floor carpet, rugs, etc will improve juat about any listening space. Popcorn ceilings are your friends. Happy listening!
Open baffle speakers
Open baffle speakers design is the simplest , to get bass response similar to other design , like ported, the baffle size must be huge to avoid low frequency degradations . Tipical size the baffle width 10-20" got weak bass performance. I am wondering how open baffle speakers design became so popular ?