I also have a pair of Impression 11A's in a 12/14 feet room connected to another small 12 / 3 feet space. The speakers are placed on the long wall and the back driver is about 20 cm (8 inches) away from wall. Absorption on this wall is crucial, not too much and not too little, but the sound is good and, unlike other users, I didn't like the speakers too much when away from the wall, the sound gets too thin IME. So in my opinion placing the speakers close to the front wall should not be a problem provided the above mentioned rule (no closer to the rear wall than the diameter of the woofer) is observed and damping the wall is possible.
On the other hand, I didn't like what the ARC room correction did to the dynamics or overall tonal balance: bass became much too rounded, with an almost nonexistant leading edge or tactility and generally speaking much too subdued (I\m not a basshead, mainly classical and jazz listener). Hope it helps!