Roland GR-55 Guitar Synthesizer, with RMC OPT-01 subsonic filter

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Filter/Buffer Roland Guitar Synthesizer Processor with Subsonic Filters and Auxiliary Inputs

Filter/Buffer Roland Guitar Synthesizer Processor with Subsonic Filters and Auxiliary Inputs

How to Install the RMC OPT-01 for Roland GR-55

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Roland GR-55

RMC, OPT-01 Subsonic Filter for Roland GR-55 Synth

Roland GR-55

Roland GR-55 Guitar Synthesizer, GK3 Pickup & RMC-OPT-01 Subsonic Filter installed

RMC, OPT-01 Subsonic Filter for Roland GR-55 Synth