The Variispeed Fan Speed Controller
A fan controller that adjusts and controls the speed of your fans. It does this conveniently by having a variable speed control dial, along with full power and off and is suitable for up to 300w fans. This is undoubtedly one of the cheapest and effective ways in which you can control you intake or outake fan spped which helps to reduce your noise levels. Simply plug and play and your off, no wiring etc needed.
Tip: Always check your fan amp output as larger fans require a higher amp controller to handle the extra power.