Roland GR-55 Guitar Synthesizer, with RMC OPT-01 subsonic filter
RMC, OPT-01 Subsonic Filter for Roland GR-55 Synth
SubSonic filter module - BlueCollars Electronics [BluCoE]
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Roland GR-55 Guitar Synthesizer, GK3 Pickup & RMC-OPT-01 Subsonic Filter installed
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RMC, OPT-01 Subsonic Filter for Roland GR-55 Synth
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RMC, OPT-01 Subsonic Filter for Roland GR-55 Synth
The RMC OPT-01 MKII is a 6-channel subsonic filter module that installs in the Roland GR-55 to eliminate the subsonic over-sensitivity in that unit.,
RMC OPT-01 MKII subsonic filter module for Roland GR-55
Roland GR-55 Guitar Synthesizer, with RMC OPT-01 subsonic filter, & Yamaha OM guitar & GK3 Midi PU
Roland GR-55 Guitar Synthesizer with GK-3 Pickup
Roland GR-55 Guitar Synthesizer
How to Install the RMC OPT-01 for Roland GR-55