GR-1: Recommended Power Supply April 11, 2023 01:55 Updated Follow Roland ACI-120 I/J Roland ACB-120/T Related articles VG-8 VG-88: Differences Between Guitar Synthesizers and the VG-8 GR-1: Initializing - Factory Reset SPD-SX PRO: What kind of expression pedal can I use? E-70: Technical Specifications SPD-SX PRO: Recommended Power Adapter