Harrison EQ "Bandwidth" settings

[nashville]

Hello! I was reading the Series Twelve manual and saw that the EQs didn't have a Q control, they have a "Bandwidth" control. And it isn't a "Bw=Fc/Q" kind of thing. It's "seven narrow and seven wide settings" for the low mid and high mid bands, and "seven narrow settings, six wide settings, and a shelving option" for the low and high bands.

And in the manual it shows EQ settings with Bw set to "0" and the graph looks like a normal bell with a 1 octave bandwidth at the -3dB points, so that would be a Q of ~1.41. Does anyone here know what the other "Bw" settings correspond to as far as a Q value would go?

Thanks!