9V Power Adapter for Guitar Effects Pedal Center Negative 100ma/300mA/500mA/1A v | Reverb
Amazon.com: 9V 2A~100mA Power Supply Adapter (Notice: Center Negative, Sleeve 5.5 x 2.1mm Plug), for 9 Volt Piano Keyboards, Pedalboard, Guitar Effect Pedal and Other 9v Electronic Devices -8.2FT
Source power adapter 100 240v 50 60 hz ac-dc 9v 100ma 50ma 1a 11.5a 2a 2.5a 3a 3.5a 4a power supply adapter on m.alibaba.com
9 Volt Ac Adapter Charger For 9V 100Ma 0.1A and similar items
9V / 100mA USA Power Adaptor | US9DC-100 | Electro-Harmonix
Electro-Harmonix 9DC100 9 Volt Power Adaptor | Sweetwater