I was about to upgrade from a Cioks DC10 to a Zuma, for both the better noise performance, weight savings and the ability to power my Line 6 HX Effects with a current doubler cable. I've just read on The Gear Page forums that the Zuma doesn't work well with the Ampli-Firebox? I did a quick search and found this post by @Jace Nuzback The Zuma is not a good match for the AmpliFirebox. Rather than providing all of the power as soon as it's connected, it ramps up the power. This is an issue for quite a few other pedals too. Strymon is aware of the issue. I'd recommend the True Tone CS series of power supplies instead. Jace, is there any way to work around this or get the Zuma and Ampli-Firebox to work seamlessly together? Or is this something that just cannot be overcome? In which case I'd probably cross the Zuma off my list.