MATRIXSYNTH: Oberheim 4 Voice SEM Rack


Sunday, August 25, 2013

Oberheim 4 Voice SEM Rack


via this auction - learn how to sell on eBay here

"For someone who doesn't mind a project, these are the elements of an incredible vintage Oberheim 4 Voice Rack! It needs work in terms of wiring in the back although it has a huge head start plus some bonus extras like an 8 channel midi to CV converter rack as well as the 20 space rack it is housed in (pictured) which is all included (with the front and back covers as well).

What you get in this auction is the following modules:

Oberheim SEM Programmer Modular with 8 cards (capable of controlling an additional 4 SEMS if you wanted to make it an 8 voice... note that only 4 SEMS are included in this auction)
4 X Oberheim SEM Synth Expander Modules (one of the best sounding analog synths and filters ever made)
1 X Polyphonic Keyboard Module
*Note that there is no output module so individual SEM outputs would have to be wired to jacks and run into a mixer (part of the "project' unfinished)
There's also a power supply but it is currently 220V (European power) however you can use a step down transformer available from Radio Shack (not included). Power cable not included.
1 X 8 Channel Midi to CV converter. I believe this was a custom kit and I have no idea if it works. Everything is sold AS IS with no returns. However, it was my understanding that it all did work it just needs someone to get it all wired up. No guarantees that it won't need some repair but I am optimistic that it won't need much if any actual repair and another GREAT thing about this analog synth is that it's discrete. No rare chips in Oberheim SEMS and most keyboard techs can work on them without a problem. So, as "vintage synth projects" go this one is one of the least risky because it's discrete and everything is accessible. In fact, if you REALLY wanted to make it an amazing project you would have all of the patch points brought out turning this into a complete modular synth. Everything is VERY easily accessible on the boards of the SEMS to get to the filter, amp, osc, lfo in/outs..."

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