All Halfmoon Electronics Motor Systems connect to your amplifier by plugging into the outlets on the amp. You may use the 1 motor system along with a stock motor controlling the other rotor. These systems are not designed for end user installation. Although they do plug into the amp, there is wiring that needs to be done from the controller to the moters etc. PLEASE DO NOT ATTEMPT TO INSTALL THESE MOTORS WITHOUT THOROUGH KNOWLEDGE OF ELECTRONICS. These systems deal with 3 phase 220 Volt Power. You may be killed, or worse. Retrofit Leslie Motor Systems > Complete Systems   Complete 1 motor system Complete system for replacing 1 Motor. Includes Controller, Motor, Relay, and all mounting Hardware. System is designed for professional installation. End user support not provided. $ 399.00               More Information Complete 2 Motor 2 Controller System Complete system for replacing 2 Motors. Includes 2 Controllers, 2 Motors, Relay, and all mounting Hardware. Use this system when you want each motor to have it's own separate acceleration/deceleration settings. System is designed for professional installation. End user support not provided. $ 895.00               More Information Complete 2 Motor System Complete system for replacing both Motors. Includes Controller, 2 Motors, Relay, and all mounting Hardware. System is designed for professional installation. End user support not provided. $ 695.00               More Information