Well, without jumping into the fray, generally speaking, if you want better imaging, you must improve the acoustics in the dimension that is lacking. If you want depth, then the acoustics behind the speaker's matter most, which can be improved in a variety of ways. Moving the speakers as well as adding absorption and diffusion behind them both work well.
However, the space behind the listener also matters. If you want width, pay attention to the acoustics to the sides.
Best,
E
However, the space behind the listener also matters. If you want width, pay attention to the acoustics to the sides.
Best,
E