MATRIXSYNTH: Oberheim OB-Xa Analog Synthesizer SN 820505


Tuesday, November 10, 2015

Oberheim OB-Xa Analog Synthesizer SN 820505

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"Oberheim OB-Xa in excellent physical condition:

- Latest firmware revision "G" installed and original factory patches uploaded.

- Powers on and fully functional with the only known issue being that under the Filter for OSC 2, the HALF button is not fully functional. No response from the button when depressed. The LED above the button will no illuminate. The HALF function does operate correctly when a factory patch setting is selected which in turn illuminates the LED and depressing the HALF button will turn off the HALF selection and extinguish the LED. However again pressing the HALF button will not allow re-selection of the setting nor again illuminate the LED above the button.

- All 8 voice boards were recapped with new electrolytics a few years ago. Instrument powers on and autotune functions properly to tune voice boards.

- New key bushings were also installed a few years ago. Keys are nice and soft when depressed, not clunky."


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