New JR and Hitec HV servos. How to maximize their potential?

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you're better off with a standard voltage servo in a buggy, plenty of torque and speed. the spektrum passes whatever voltage is input, so the output is dependent on your bec setting.

these high volt servos are aimed at rock crawlers where stalled turning can pull serious amps.

to feed high voltage servos, you either pull the red and black wires and still plug the white(signal) wire into the receiver. then wire the red and black to either a 2s lipo or a dedicated bec for your servo