Amazon.com: UpBright 9V AC Adapter Compatible with Alesis SR-16 SR16 16-Bit and 24-Bit Stereo Electronic Digital Drum Machine 9VAC 830mA AC9V 0.83A 1A Class 2 Transformer Power Supply Charger (9V AC Power
Alesis SR16 Drum Machine: Review and Guide - Drumming Fanatics