The recommended power supply for the GP-6, GP-9, and GP-9M is the PSB-18U AC Adaptor.
This is a universal AC adaptor that you can use anywhere in the world, but you must use the local power cable for the adaptor. To obtain this AC adaptor, contact your local Roland dealer or authorized Roland service center.
Note: The use of any other power supply can result in malfunctions and/or permanent damage to the product.