IME, don't try to get more overall volume by increasing the bass eq so much. Work with the mids, possible reduce the high end so your tone won't be so clanky/tinny. Btw, which amp do you use? Would you also post the model number of your bass. Lots of TBrs will know what it is. Also do have more than one speaker cab available and what type would it be?
Also, it may not be the Amp EQ settings.
It could be:
1) your speaker cab
2) different venue sizes/configurations
3) your bass cab orientation
4) your bass guitar tone settings and whether it's active or passive.
5) the positioning of your right hand in relationship to the pickups.
6) the type of strings you use.
Some suggestions:
1) I suggest taking a look at TBr fdeck's
HPF(High pass filter) that eliminates unwanted noise transients below 35hz that suck amp power and can created muddiness. It is also adjustable up to 140hz that can help take out boominess created by a venue, tightens up your low end tone and protects your speakers.
It costs around $100 and many TBrs swear by them. I also not read a negative review.
2) Go wireless or get a extra chord (30 - 40 feet or so) so you can go FOH during sound check and hear how your bass is sitting in the mix. Make your adjustments based on what you hear out front rather than what you hear on stage.
3) Stack your cab(s) vertically. Two vertically stacked 2x10's will give you better stage monitoring and improve FOH dispersion (be heard more evenly throughout the venue) and reduce cross envelop filtering (distortion).
If you only have one 2x10, adding another will raise your headroom (more amp watts/cleaner at higher volume) and when stacked, accomplish what was previously stated.
4) Try your tone control all the way up and adjust your amp EQ from there. The test several other bass settings and listen to how the tone changes. Possibly make a not of the settings to try out at the next rehearsal and gig.
5) Try playing over the bridge pickup and listen to how the tone changes. Do this many times so you have in your brain how the tones changes and try it at gigs/rehearsals.
6) What type of strings do you use? How old are they?
Good luck.
Note: if any of the gurus check in, please correct my post, if necessary. Thanks!