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12V 500mA DC Power Supply AC Adapter with 2.1 x 5.5 mm Center Negative (-) Plug
Amazon.com: 18V Negative Center Power Supply AC DC Adapter for 18V Guitar Effects Pedals, 18VPDL : Musical Instruments
9V 1A Power Supply AC Adapter with 6 ft. Cord 2.1 x 5.5mm Center Negative (-) Plug
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FLEOR 9V 1A Power Supply Center-Negative Guitar Pedal Power Supply
9V 1A 2A Power Supply AC/DC Center Negative Adapter for Casio Piano Keyboard Guitar Effects Pedal Boss Zoom Dunlop Ditto Charger - AliExpress
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18V 1A Power Adapter Negative Center Noiseless Adaptor For Guitar Effects Pedal JOYO Caline Effects Pedal Power Supply-EU Plug - AliExpress
Amazon.com: 9V DC 1A Power Supply Adapter for Guitar Effects Pedal Center Negative : Musical Instruments