HX Stomp power supply in Helix Posted January 14 What you need to know is that the HX Stomp draws about 900mA at 9V. With the right cables you can make it work with most power supplies. I use a CIOKS DC7. The outputs are 600mA each so I use a doubling cable and a cable that converts the right size for the stomp. The CIOKS website has plenty of information on this. I have found this to be a great power supply. I also used an MXR ISO Block before using the 800mA output. Although perhaps not ideal, I have heard that most power supplies under rate the capacity. So a 500mA may actually provide closer to 600mA. But every manufacturer is different. Good luck.