The BM pickups are wired in series. This allows you to combine single coil pickups to act like a humbucker. Brian uses a treble boaster because he uses the normal channel of the Vox AC30 which is dark sounding on it's own. I used to own this guitar and agree it is a bit dark sounding unless you play single pickups on their own as opposed to multiple pickups in series. It is also a very unique sounding instrument and can get close to Brian's sound. As far as your treble boaster, try using the boost eq.
