Dual Adder / Subtractor
http://www.shakmatmodular.com/products/sd.html
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Mint condition. Comes with box, paperwork, power cable and screws. SumDif is a 2hp dual adder/differentiator module capable of handling both CV and audio signals. Each section can be used as as a 2:1 unity mixer, a 1:2 buffered multiple or a signal inverter. Can also be used as a Mid/Side processor. Features optional -6dB gain for the first section.• 2 HP 29 mm deepDualStereo Mixer Multiple Utility
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