A security tag and system for securing objects, the system and security tag includes an acousto magnetic electronic article surveillance component that has a housing with a defined surface area. The circuit generates an output signal indicative of the power of the amplified audio signal. In contrast to a true optimization technique that can require computing up to N. The signal quality comprises a power level of each of the plurality of antennas and a correlation of the plurality of antennas. A ball valve element for a rotary ball valve assembly formed using such a method; and a rotary ball valve assembly comprising a ball valve element formed using such a method are also provided . One operating mode corresponds to a torque creeping mode for transmitting the setpoint signal when the motor vehicle runs with a speed lower than a predetermined threshold and the brake pedal thereof is inactivated.