These mains adapters have been tested by an employee who is a musician as well as other guitarists using Boss stomp pedals.
SOOLIU 9V AC-DC Adapter Power Supply Compatible with Boss CH-1 Super Chorus Pedal Charger Cord PSU
For Yamaha DGX-220 Portable Grand PA-150 Mains Power Adapter Power supply 12V
For Yamaha YPG-235 Portable Grand PA-150 Mains Power Adapter Power supply 12V
For Yamaha P-115 Digital Piano PA-150 Mains Power Adapter Power supply 12V
For Yamaha PSR-E463 Keyboard PA-150 Mains Power Adapter Power supply 12V
For Yamaha PSR-E363 Keyboard PA-150 Mains Power Adapter Power supply 12V
