Some interesting history via the listing: "If you are looking at this item you no doubt know what it is and what it is capable of. You will also be aware that they are very rare and don’t often come up for sale.
The Studio Electronics “Obie-Rack” is effectively two Oberheim SEM modules in a rack but with a list of very useable modifications, which make it an incredible performer. This unit uses the “ORIGINAL” Oberheim cards (NOT REPRODUCTIONS). Each module has 2 VCO’s, 2 Envelope Generators and a single VCF section.
This unit has had only one owner, myself and is “virtually” new. Since purchase it has been stored in its fully enclosed shock-mounted transport rack case (case not included). Cosmetically the front panel face is excellent, there is only minor rack rash. As for the rest of the unit there is a minor abrasion here or there but nothing abnormal considering its age. It was stored in a smoke free and climate-controlled environment.
This unit was bought new in October of 1990 directly from Greg St Regis of Studio Electronics and shipped to Europe (where I lived at that time) with the idea of hopefully attempting to market the product there. There was great interest in it but it was hard to compete in Europe with Roland, Korg and Yamaha and what they were selling at that time. Needless to say the lack of voices was an insurmountable hurdle sale’s wise.