The ION is a single knobbed version of the Hyperion. So it’s the exact same circuit as the Hyperion, but with the pregain hardwired around 9 o’clock to noon.
Revision #’s / # made since February 2012
IO12T / 19 – Single pcb, Through hole, “floating” pcb’s, 100k audio taper volume pot, other pot 100k linear taper, all resistors film comp, all caps Dipped Radial Multilayer Ceramic, TO-92 transistors.
printed artwork serial #’s / # made since February 2012