Here’s where I’d suggest starting. On the jazz bass, turn all knobs wide open. For clarity, you might try rolling off the neck pickup a little.
On the amp, set all EQ knobs to noon, and fully turn off any voicing filters, like VLE or VLF. Set master volume to noon. Set gain to 0 and turn up until you get a good level. Try adjusting EQ one knob at a time and really listen to the changes you hear. It helps to stand back a bit from the amp. Play along with a drum machine or recorded music that is playing through speakers to get a sense of what you will sound like in the mix.
Clarity in the bass lies in the midrange, so don’t cut it unless the sound is really boxy or too strident. While a scooped midrange might sound pleasant on your own, it won’t cut with a loud drummer. And by all means, protect your hearing.
On the amp, set all EQ knobs to noon, and fully turn off any voicing filters, like VLE or VLF. Set master volume to noon. Set gain to 0 and turn up until you get a good level. Try adjusting EQ one knob at a time and really listen to the changes you hear. It helps to stand back a bit from the amp. Play along with a drum machine or recorded music that is playing through speakers to get a sense of what you will sound like in the mix.
Clarity in the bass lies in the midrange, so don’t cut it unless the sound is really boxy or too strident. While a scooped midrange might sound pleasant on your own, it won’t cut with a loud drummer. And by all means, protect your hearing.