Lewinski is correct. Typical speakers must be a minimum of 30 inches off the backwall to image properly and get decent bass. Dipole speakers more like 6 feet. Sidewall HF reflections should be reduced with furniture or Sonex etc.. Use a mirror or mirror and a laser pointer to find the right spot for these. The optimum listening position should not be in the center of the room, but rather a bit off-center away from the speakers.
Steve N.
Empirical Audio
Steve N.
Empirical Audio