“his is the early Roland GR-500 Guitar Synthesizer Brain. This unit worked great when it was retired several years ago. That is all we have to go on. The proprietary cable is missing. It powers up and lights work, the LFO light slows down and speeds up properly. That said, we are selling this AS-IS as untested completely. WE are also selling the GR Japan made guitar in a separate auction. “ Click here to visit listing on eBay
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