I think it depends on the design of the reversing circuit. If all it does is amplify the signal (the output of most of the 2.4Ghz systems is only about 2.7volts), there should be no problem. Now , there will be a very slight shift (in the order of one or two microseconds) in the time the pulse goes to the servo due to rise and fall times of the pulse but that would be nearly undetectable by the operator or plane. If you are using some of the very old servos, some required that the signal to the servo be 1/2 the voltage of the power source so, if using 6 volts you had to have a 3 volt minimum amplitude on the servo signal thus requireing that you use an amplifier. The answer to your original question depends on the compatibility of the entire system you are using, not a cut and dried answer.