So after expanding my pedal board to 13 pedals, and after beginning to notice more and more electrical hum with each pedal I added, I decided it was time to make the jump and splash out on a fully isolated power supply. The gap in price between isolated and non isolated is huge - I went from using the £35 Harley Benton Power Plant to the £225 Walrus Audio Phoenix. I went for the Phoenix for a few reasons, it has 15 outputs, leaving me room to add a couple more pedals, and some of the outputs are switchable between 9, 12 and 18 volts. This suited me as a couple of my pedals take 12v power. The problem I have now is that the 12 and 18v outputs only supply 100ma, and my 12v pedals take 200ma. This has meant that despite shelling out over £200 I still need separate power supplies for my 12v pedals. So be warned and double check your user manuals for all your pedals before you buy this thing. But, I can testify that it is indeed a reliable low noise clean power supply, it will suit a lot of players and it is much cheaper than the voodoo lab mondo, and it's also smaller in size, which can be vital on a pedal board.