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

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

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

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

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

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

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

GKFX-1 - Piezo Subsonic Filter

Roland GR-55 Guitar Synthesizer Blue Multi Effects Pedal Used with Power Cable

Roland GR-55 Guitar Synthesizer, with RMC OPT-01 subsonic filter, & Yamaha OM guitar & GK3 Midi PU