From experience, those wall reflections are most likely the cause of your 'hard' sound, not your gear or cables.
With your speakers being rather far from both sidewalls and roughly equidistant from them, I do not think the acoustic-reflection differences between the two types of walls are enough to explain why your image is pulling to the left.
You are instead hearing the reflection off the top of your large coffee table, which is located left of center.
Best of luck!
Roy Johnson
Designer
Green Mountain Audio
With your speakers being rather far from both sidewalls and roughly equidistant from them, I do not think the acoustic-reflection differences between the two types of walls are enough to explain why your image is pulling to the left.
You are instead hearing the reflection off the top of your large coffee table, which is located left of center.
Best of luck!
Roy Johnson
Designer
Green Mountain Audio