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Matching networks provide the interface between power amplifiers and piezoelectric shakers. The impedance which the shaker presents to the power amplifier is capacitive (reactive) and therefore decreases with increasing frequency. To provide improved performance from the shaker, impedance matching is needed. The matching network provides voltage step-up to allow the piezoelectric shaker to be driven at its full voltage level. At very high frequencies, lower output voltages are used to better match the reactive load. Additional functions such as channel separation, distortion reduction, and fusing are also provided by some matching networks. All N7/N8 series networks are 19” rack mountable.