Korg AC Adapter for Volca Series (9v DC, 1700ma Center Positive)
9V 2.5MM ADAPTOR for MID WM8650 ANDROID TABLET LA-915 LA915 CHARGER POWER SUPPLY | eBay
Amazon.com: LotFancy 9V Power Supply for Guitar Pedals, AC DC Power Cord, Adapter for BOSS Effects Pedal, Roland Musical Instruments, Distortion, Casio Keyboard, PSA -120S, UL Listed, 850mA, Center Negative : Musical