The answer is that your bass cabinet is heavily sffected by the environment it is and where you are standing in relation to it. What you hear is the sound of your speakers mixed in with the reflected sounds from walls, ceilings and floors. Basically your speaker has a dofferent sound on and off axis and the further you are away from it the more sound energy that is reflected is blended into the sound.If the room acoustics are not ideal you know the sound you get is very uneven in response and muddy.
EQ is NOT the answer!
The Ear Box produces a near field sound that, when positioned close to you, will give you far greater cleaity because it greatly in creases the ratio of direct sound to the undesirable acoustics of the venue. It does not produce the full spectrum of a bass; it blends in with the low frequencies of your cabinet. Standing in front of you bass rig up close gives you the most clarity but at the expense of your audience. You body will block the mid range and high soaking them up like a sponge. So your audience will hear a far more degraded sound than you.