Neutronics offers a variety of brushless motor electronic speed controls from 50W to 30kW.

Speed controllers for projects requiring more than 8,000 watts or voltages over 12S. 

Exciting new line of ESCs which operate up to 100V and 30kW!  Highly-developed firmware allows use in numerous specialty applications.

Speed Controllers for projects under 8,000 watts.  Great controllers for RC cars!

Quality mass-market ESCs designed and assembled in Kansas. Castle has a controller and firmware for most any application under 8kW.