Btw, in my experience there are two main source of noise in pedalboards.[list=1]
[*]Some pedals can introduce hiss or whine into the signal just by sharing the same daisy chain. Try unplugging the power from each pedal one at a time to see if there is a main culprit.
[*]Some patch cables have poor shielding and take in a lot of interference, especially if you have a dimmer switch nearby. With my dimmer switch on, I put my patch cables in a true bypass looper and found that anything with plastic jacks, added a massive amount of buzzing to my signal just by having one single patch cable in line!
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After taking out the problem pedals, or putting them on their own separate supply, and ditching all the dodgy patch cables, I have a very quiet setup with my Johnny Shredfreak PSU now!