^
Must be very sax heavy (or maybe not the right edit there to get the band mix?). I'm not at a place I can pay close attention or blast it but I'm really only hearing sax there.
Acoustic bass is always difficult to get the right balance (acoustic piano maybe worse though...).
Usually eq will help since there's not usually anything else down there (assuming the placement mitigates room reflections as it should onstage).
You can usually see where the root of the bass notes are in a frequency analysis, but don't forget the overtones. I find some attention to the 400 to 800 Hz area helps bass sound. That higher end starts to mingle with other instruments though...
Also note that roughly 125 to 400 is sort of a no man's land where the frequencies are not necessarily that pleasing (there's a technical term for that I forget) so it is useful to be careful there.
I don't know if your approach of compressing the lows would in the end be helpful?