Awesome recommendations!! Thanks everyone. Some of you made me laugh with your funnies.
The bassist has an SWR now that I recall. But it is fairly old. It is a 1 x 15" combo amp (not a head). The drummer plays loud normally and frankly my volume is not that high. The practice room though is pretty small about 10x9'.
She has tried boosting the mids, but it sounded too trebly. Considering we are new as a group, we probably need to experiment more to find the sweet spot. Regardless, I feel she ought to get a new replacement amp. We would need some headroom should we turn out gigging.
I can turn my bass down, but it is not high right now.
No sense in reinventing the wheel.
Despite this being Talkbass I say there is no sense in spending a bunch of money on anything (except probably a smaller quitar amp for you) until the fundamental issues are taken care of.
First thing: Just turn down. Everyone.
Next, her EQ: Boost the mids, cut EVERYTHING below 80Hz, and if it still sounds tinny or trebly reduce treble as necessary. Cutting treble will make the bass tone appear more bassy, and a plus if she is still working out her technique (reference your comments about perhaps some sloppiness in her fretting her notes) having less high end will help "mask" her mistakes for now.
As her technique and confidence improves then over time she will work out her own tone and sound and spend money on what she actually needs.
And set her amp on a milkcrate to get it closer to everyone's ears. Floor coupling is NOT a concern when rehearsing in such a small space, actually the real low frequencies in this situation are not good things.
Rehearsing in such a small room is already a challenge. Rehersal should be for refining the songs, fine tuning the breaks, stops, intros, solos, and such. Particularly for a new band. So don't try to play arena volumes, plenty of time for that later.
And for playing out, work on getting a decent PA versus chasing after huge stage rigs.
Good luck.
