Quote Originally Posted by Minnesnowta
That vortex jet engine is a monster, I've always used inline duct fan boosters. But I bought this new 600w HPS with some badass full spectrum hps bulbs with a yieldmaster 2 hood and a vortex 6" and ducting. Turns out I'm gonna need a fan controller because I don't want to wake up some morning midway through a flight to afghanistan in my own house. I never knew these fans were so loud/powerful.

Anyways, anyone recommend a decent/inexpensive fan speed controller?
I've been using a "speedster" for several years, with no problems. Be advised that most of these controllers will induce a lower frequency "hum" due to the nature of their operation.