I have 12 pedals, all have 9v dc.

Dont understand this thing - Voodoo Lab Pedal Power Mondo has 15 outputs for 9v: 400 mA, 250 mA, 100 mA. So, will my 9v pedals will be suitable? What stands for 400, 250, 100 mA?

Thank you
mA is just the current draw of each pedal. In some cases, you can get a smaller one and daisy chain off of one the outputs for pedals that don't draw as much current. Look up the manual for each of your pedals and add up the total number of mA's your pedals will draw.
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