GX40

The GX40 may have been intended more for bass as it has a compression control plus bass-on-bass and treble-on-treble controls to give extra boost if needed.

The first pictures show the original design of the GX40 and the later pictures show it with a different, later (probably 1980s) design.

GX40-4 GX40-3

 

GX40-2-1GX40-2-3 GX40-2-2GX40-2-5 GX40-2-4GX40-2-11 GX40-2-10 GX40-2-9 GX40-2-8 GX40-2-6