Some Executive 2 Headsets have settings in the bottom of the amplifier (older E2) and some of the newer ones have a Selector Switch on the Left hand side of the amplifier.
Their are 8 settings on the top and 4 below that on the bottom of the amplifier. The settings for this are always going to be:
1 2 3 4 5 6 7 8
Up Down Up Down Up Down Up Down
then Below that the 4 settings are
1 2 3 4
Up Down Up Down
This is much easier because it only has a “Selector” Switch on the left hand side of the Amplifier. Try all the settings to see which one works the best.