Owner of a fan company told me that PWM's are bad for these type of fans, and will have ticking noise and shortens life of motor.
He also explained how most Controllers just use resistors/POTS to lower speed of fan, and udervolting does not conserve power, because takes more current to maintain rpms at the lower speed
No clue how much truth is in that, but anyways, just ordered Lates from J-mag.
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