Derek,
Thanks for the response. To be honest, I'm not sure I understand. The Boost and Cut is the same as the current SR? I "had" a '78, and it seemed that the B&T controls provided boost only.
Signed, Mixed Up
It actually is a boost and cut function. The thing that throws everyone off is
their is no center detente position to let you know when your at a flat response.(The point where you are not adding or deleting any frequency) Try turning your treble control all the way up and your bass all the way down(counterclockwise). It should sound very thin. This means you have "cut" all the bass out of the mix. If you turn the knob halfway in the middle
then you have added back what you took away and are close to some flat response. Anything added by turning the knob all the way(Clockwise) would be a boost function. I hope this make sense.