[mercs213]

Currently using an NZXT fan controller: http://www.newegg.com/Product/Product.aspx?Item=N82E16811992007

I have Corsair Air series fans and they make a "buzzing" sound when they are anything but 100% speed on the controller. The fan controller itself also "buzzes".

Considering purchasing another fan controller and the Lamptron FC Touch caught my eye.

Would this issue persist even with a different fan controller?

 

[TheLawIX]

It may minimize the buzz noise but it won't eliminate it. The only way to eliminate the buzz is to use the PWM version of those fans and use a PWM fan controller.