I plan to renew my rig with a GK NEO212 and power amp + sansamp.
We have a 12 channel Yamaha non powered mixer, so, I plan to attach the mixer to the poweramp, and plug in the mixer the bass via sansamp, and two SM58. I don't know if this can be done, it's only for rehersals at home, two guitarrist, me, and a drummer. Loud but not at insane level.

The NEO212 goes to about 19kHz.
E.Q. the stuff and it should work.

You might want to get some sound board at the local big box hardware store (4x8 sheet), cut in 3 pieces, connect it together and place it around the drums. Makes a huge difference in practice volume and the ability to hear each other better.