I’ve found that the height of the speaker from the floor is a big factor in sound quality, especially in the bass. Higher equals less bass and fullness. I don’t think this is simply a matter of driver height in relation to your ears either. Speaker designers factor the space between the bottom of the cabinet and the floor in their measurements and design. I prefer to keep my speaker height and footing like it was intended whenever possible. This applies to other components as well. I’ve tried it, I’ve heard the differences, I almost always prefer the stock configuration.