Can industrialPPC fans be used with fan controllers and resistor cables (Low-Noise Adaptors)?

Noctua recommends not to use industrialPPC (iPPC) fans with common PC fan controllers, resistor cables (Low-Noise Adaptors) or other devices such as potentiometers that work by applying (variable) resistance rather than actually generating different voltages such as a laboratory power supply does. 

Due to the higher internal resistance of the industrialPPC motors, applying additional resistance will cause the fans not to start (e.g. with Low-Noise Adaptors) or to have high starting speeds (e.g. with most common PC fan controllers). 

Please note that the industrialPPC 12V fans feature a starting voltage of 7V and can be run at this voltage on devices such as laboratory power supplies or motherboard fan controllers, which actually generate lower voltages rather than applying resistance. 

Thus, Noctua recommends using either PWM or voltage-based motherboard fan control or laboratory/industrial power supplies for controlling the speed of industrialPPC fans.