I have around 10 pedals running off couple of power supplies: 18v(150mA) 3 pedal Daisy chain, 9v (700mA) daisy chain for the rest. I've added up the mA consumption of the chains and should be more then enough. Now to the problem: In general the pedals are quiet, but sometimes a strange static noise builds up. When i turn off the power and on again, then all is quiet again. This has happened twice at a specific rehearsal room, but i can not get the noise build-up to happen on demand to find the source of the problem. I've had noisy pedals before, but always with a CONSTANT hum or static. Now im not sure what's the problem and would a power supply with isolated outputs like voodoolabs plus2 fix the problem? Has anyone had this kind of problem before?