- GR-300 Synthcheck - A detailed 2000 word review from "The Complete Music Magazine", dated November 1980
- Gibson Explorer - Finally! A home for one of the rarer custom Gibson vintage Roland guitar synth controllers
- Jimmy Page - Vintage 1985 magazine ad featuring the guitar legend and his G-707/GR-700 rig!
- LPK-1 Installation Diagram thanks to John Doucette for emailing the scans.
- GK-20 Schematic - 13-pin Guitar Switcher, Schematic ready for download
- Filter/Buffer Schematic - Schematic ready for download.
- Roland GR-700 and GR-77B Updates: From the Roland User Group Archives, a complete MIDI guitar and MIDI bass system profile!
- Roland GR-77B Updates: Finally! The Roland GR-77B and G-77 pages have been updated. Be sure to check out the G-77 page as well.
- Vintage Roland G-505 and GR-300 combination magazine advertisement.
- GR-700 One Step Beyond!: From the 1985 Roland User Group Magazine
- GR-700 4x Memory Expansion!: Easy to do, super DIY Memory Expansion!
- Ibanez IMG2010 and MC1: Updated! High-Res Brochure from 1985
- G-707 Steve Hunter: Vintage Product Review from 1985, Part 2!
- G-707 Steve Hunter: Vintage Product Review from 1985, Part 1
- GR-500 Steve Hackett: Vintage Product Review from 1978!
- GR-500 Patch Sheet: Original Blank Patch Sheet
- GR-500 - Solo Voice Tuning : Adendum on Tuning the Solo Section
- GR-300 Filter Mod: LFO to Filter Modification
- GR-300 Output Mod: Increase the output of your GR-300!
- GR-55 Schematics, Service Notes: Full factory service notes for the Roland GR-55
- Ibanez MIU8: Specs, photos, details on the rarest of rare!
- MIU8 Schematics: Schematics and Service Manual (pdf)!
- Korg Z3 Product Page: From early Product catalog!
- Hamer A7 Guitar: Added to the guitar pages, a tribute to the Hamer Phantom A7! Tubo Lover rocks!
- GR-500 24-pin Connector Change: Documentation of the change from the original, pin-type C24 connector to the much more common C24 positive (locking frame) connector.
Features and Specifications:
Controls: Polyensemble Volume Control (3x), Bass Volume Control (3x), Solo Melody Control (3x), External Synthesizer Volume Control (3X)
Switches: Select Footswitches - Channel A/B/C/Manual, Remote Footswitch,1
Indicators: Manual/Preset Channel Indicators, Channel A/B/C/Manual, Remote Indicator ,1
Connectors: Connector for Guitar Controller (GS-500) 1, Connector for Synthesizer (GR-500) 1, Remote Jack (1)
Dimensions: 398 (W) x 78 (H) x 235 (D) mm
Weight: 3.2 kg