v1.4
v1.4 is now slimmer and has a depth of only 37mm. The power connector has the negative -12V side downwards (marked with the text “red stripe” on the pcb). The solder pads have moved so they align behind each jack. The orientation of the solderswitches for selecting type A or B are the same, see here.
v1.3 and earlier
Serial number from 110 and above have a nice dedicated frontpanel. The add-on pcb on the back are also from now on soldered to the front for a more robust functionality.
Earlier versions was based on the Otto Passive with a front panel with the numbers 1 to 8 an no other texts. The add-on pcb on the back was connected with a female header.