EQ Frequencies

Hello.I have questions about eq on clip. When i adjust custom eq which frequency i adjust for each band ? And what is the range (+/- 12db) ? Sorry but there is no description of this.

I’m copy/pasting this from an other forum:

1st band: it’s a “low shelf” filter with cutoff freq. around 150 Hz (here’s the reason of the muddy sound in that region, 150 Hz is too high)
2nd band: it’s a “peak shelf” filter with center frequency around 400 Hz
3rd band: another “peak shelf” filter with center freq. around 1.1 KHz
4th band: another “peak shelf” filter with center freq. around 3.3 KHz
5th band: it’s a “high shelf” filter with cutoff freq. around 8 KHz