I've been thinking about getting a power supply for my board to replace a one spot daisy chain and the wall wart for an H9. The H9 wants a positive ground and the advertising for the mini iso brick says it can handle both negative and positive. There's a video on Sweetwater showing the mini iso brick powering an H9 and a few other pedals. There's no mention of a ground reverse switch or special cable. Is something like that required or does it just not care which way the juice is flowing?
