I added a Nova Repeater to the end of my pedalboard. The board is two to three times noisier than without the Nova Repeater. It's my first delay, fwiw, so don't know -- is this just how it is? At least the noise dials down if I turn the guitar off. It doesn't matter whether or not the delay is engaged. The power supply is the VL PP2. Some of the pedals are on a daisy chain so I can have 90 degree connectors. The Nova Repeater is on a dedicated output, as are a couple other pedals. The NP is less noisy powered from the PP2 vs. the wall wart that came with it. I've been running batteries up until recently, so I know how little noise there can be.