A system to use in combination with an ECG signal acquisition system is provided. The ECG signal acquisition system can be operable to connect to an arrangement of electrodes on a subject. The system can include a circuit board and a plurality of subcircuits mounted on the circuit board. The plurality of subcircuits can be arranged on the circuit board having an electrical impedance that correlate to an electrical impedance of the arrangement of electrodes on the skin surface of the subject. The system can further include an output connector connected in electrical communication to receive signals communicated from the plurality of subcircuits for communication to the ECG acquisition system.
