In 1970 Tonus envisaged the ARP 2500 synthesizer with a massive 25 different modules. This video uncovers the missing modules that never made it into production, with only the occasional prototype surfacing over 50 year ago. 

AMSynths have re-imagined six of these modules for launch in 2024. They can be used to expand the B2500 eco-system or within any Eurorack setup, to create new and interesting sounds. Enjoy the video!