Great super-tight sounding high gain module without any of the flubby bottom end or top end fizz that some of the other stock high gain modules have. Definitely my favourite module straight out of the box.
How SW2 works
When SW2 is in the right position (mid scoop), the tone stack uses C14 only (250pF). With the switch in the left postion, C5 (250pF) is added in parallel to C15, thereby doubling the capacitance to 500pF. The slope resistor is 56k Ohm.