Without looking at what frequencies each band is centered on, here's a breakdown of what you'll most likely affect with the bands:
1st band - sub bass(the kind that shakes your mirrors, etc.)
2nd band - upper bass/midbass, things like kick drums, lower bass guitar notes, tom drums
3rd-5th bands - midrange, male vocals, up into female vocals, guitar, lots of music information here
6th band - this is likely going to change the harshness of cymbals quite a bit.
7th-8th bands - sibilance(the sss sound sometimes heard from vocals), harmonics of many instruments