via this auction
"People often ask me, "Tom, what was the favorite one of your synthesizers from before?" And my answer is always, " The Two Voice" ~Tom OberheimOwn a VERY RARE piece of synthesizer history! One of the 1st synths capable of playing more that one note at a time, and expandable to play up to 8!
In 1974 Tom Oberheim developed the SEM, the Synthesizer Expansion Module, It was designed to be a voice expansion for the MiniMoog. Later that year he put 2 SEM's together, and added Keys, and Oberheims 1st complete synthesizer was born! THIS IS SERIAL #0081 It also includes the Mini Sequencer expansion! I have spent a lot of money having this painstakingly professionally restored, its 100% functional there are no dirty pots, sticky keys, all parameter changes are smooth and instant, it is perfectly tuned, and stays in tune. I have all the manuals, schematics for each and every component, and a detailed parts list. Besides a couple dings on the built in flight case, it is in near perfect condition, inside and out! And i think the dings in the case can be repaired cheap. for something 40 years and 10 months old, i honestly don't think you could even hope to get something in better condition unless it was never opened or used, and even then a lot of internal components would need to be replaced. Also on the rear there are `some inputs and outputs, to control voice expansions among other things, but also a added feature has been built into this one, output 1, and 2. so you can sent each voice to wherever you want. this was also installed professionally, and uses unused ports, so not only does it work perfectly, it looks professional as well, and without doing anything to damage or take away value from this historic synth! With the added Mini Sequencer you can use 1 voice solely for the sequencer, while you play the other, or vise versa, or send them both to the sequencer, or one to the famous oberheim sample and hold feature!"
