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Warwick thumb ltd 'Dirty Blonde'

Hey there,
just got me a Thumb BO 4 2006 ltd 'Dirty Blonde' this bass just arrived yesterday and sounds killer! As I haven't had a great time to experiment with it yet I thought I'd ask here, what's the layout for all the nobs? I know there's a stacked push/pull volume and pickup select, with the push/pull bypassing active pre amp. There's also a mid as well as a stacked push/pull bass and treble pot. Anyone know what the push/pull on the bass and treble does?