Agree on the wall description. If it is the wall in front of the listener how can it be the "rear wall"?
Now for the problem (regardless of what you call it). Bass frequencies load up (are emphasized) at room boundaries. Any two planes (such as wall and floor) are the normal example but corners are three plane intersections and therefore create greater emphasis. Few speakers are specifically designed to compensate for or take advantage of this condition.
Klipsch corner horns were designed to take advantage of the loading. AR-9s, and their offspring, were designed to compensate for this loading (by driver size, placement, and crossover points).
I don't know how many other speakers were designed from one of these two concepts but they include Snell Type A, Allison, Naim, Linn, and AudioNote. Also, the suggestion for bass shy models may work but you could end up with an upper bass emphasis without any mid or lower bass, resulting in a heavy or overly warm sound.
Then in addition to bass response, imaging can also be affected by close wall placement.
Good luck.
Now for the problem (regardless of what you call it). Bass frequencies load up (are emphasized) at room boundaries. Any two planes (such as wall and floor) are the normal example but corners are three plane intersections and therefore create greater emphasis. Few speakers are specifically designed to compensate for or take advantage of this condition.
Klipsch corner horns were designed to take advantage of the loading. AR-9s, and their offspring, were designed to compensate for this loading (by driver size, placement, and crossover points).
I don't know how many other speakers were designed from one of these two concepts but they include Snell Type A, Allison, Naim, Linn, and AudioNote. Also, the suggestion for bass shy models may work but you could end up with an upper bass emphasis without any mid or lower bass, resulting in a heavy or overly warm sound.
Then in addition to bass response, imaging can also be affected by close wall placement.
Good luck.