I did this interface in a spare dark grey Spartanite case that a friend found in his grandmother's house.
It interconnects 2 Synthis thanks to the prestopatch slots.

I designed the front panel and had it manufactured by Schaeffer AG, quick and professional work.

Features :

• room and PSU for up to 8 eurorack modules
• 2 switchable inverters
• 1 signal amplifier with variable gain
• 3 attenuators connected in series like Moog 995
• 2 passive multiples 
• 2 buffered active multiples
• 36x36 Ghielmetti matrix
• 2 prestopatch slots

Here's a sound sample, 2 Synthi A's interconnected, no sequencer was used, only other device is a Korg SE-500 Stage Echo. Recorded live in one take, no postproduction.





I had to add  a prestopatch slot to my Synthi A MKI.
To preserve its original pin park, a new one was done with a piece of wood and an aluminium plate.

My full EMS set... pic : Fabonthemoon

No hole Push-pull pots Matrix MKI/MKII layout Voltage controlled shape and response Hi/lo range switchable oscillators Simple Random Voltage Generator and Sample & Hold Documents, manuals, dopesheets, links

Filter 18/24 db Filter slew/unslew Oscillator synchronization Attack and decay time extension LEDs Contact