http://www.ems-synthi.demon.co.uk/ Electronic Music Studios Original EMS synths still in production and new models. http://machines.hyperreal.org/manufacturers/EMS/ Music Machines: EMS Overview from 1969-1979. Information, images, and schematics. http://www.oldtech.com/synth/EMSSynthiE.html Old Tech Synth Site - EMS Synthi-E Image and data sheet.