I just got two of those monster high speed triple blade Deltas from Sidewinder along with a 25w 10ohm ohmite rheostat. The rheostat takes them down to about 7 volts from what I can tell, but I really want to run them at around 5volts through the Rheostat so that I can still adjust them. These things still pull a lot of air even at 5 volts. What do I need to wire in to reduce the 12v in to about 9v to feed the Rheostat? As much air as these things pull, I don't see myself needing them above 9v or so.