I have a few pedals that use internal charge pumps to increase voltage to 18v or perhaps higher. These are typically powered at 9v base load. Can I safely run these pedals up to 12v vs. 9v? This would be convenient with my Voodoo 4x4 [extra 12v outlet]. The pedal in specific is the EQD Warden. I have lots of other pedals that might afford similar opportunities, however. Note: I've emailed the manufacturer but not yet heard back. [This isn't a complaint. I only emailed them yesterday. I've had awesome service from this manufacturer historically.] Note2: I ran the Warden on accident at 12v and it sounded great. I don't want to keep running it at that level, however, if I'm going to torch the pedal. Thanks for your help!!!