Adjust sub cross over frequency

Got a sub today. I love the output but I’m having a bit of an issue. Due to my room layout I can only position the sub to the side of my sitting position. Low sub tones are generally non directional but I find that the sub also seems to handle a lot of mid tones for some reason which means that my ear can locate its position. It is rather annoying.

Is there a way to change the crossover frequency with the beam so that the beam handles the low mid tones and the sub concentrates just on the deep notes?

In an ideal world I would move the sub closer to the beam at the front near the tv but unfortunately it’s not possible.