EMS (ELECTRONIC MUSIC STUDIOS) 1975 SYNTHI-E ANALOGUE SYNTHESIZER Vintage 1970s Synth Sound Module. No.123 of circa 200. Designed by Tim Orr for 'EMS', this remarkable D-battery powered synthesizer comes in its original briefcase format. Most experts approximate that less than 200 of these units were made, largely for educational institutions. Check out the photos!