Hello, nice to see you here :)
In this video I demonstrate the mode of action of a
'Bill Lawrence QFilter'
in connection with Bill Lawrence (Bill'n Becky) L280/290 pickups.

QFilter circuit: https://www.wildepickups.com/products...
Pickups: https://www.wildepickups.com/products...

Sound is made with 'Positive Grid Bias FX2' Software
https://www.positivegrid.com/biasfx/

The guitar is homebuild with alderbody and maple/rosewoodneck from 'MLFactory'.
https://www.gitarrebestellen.de/

Additional parts from 'Tonematters'
https://www.tonematters.com/

Thanks for watching.