With a hearing aid device, the problem arises of having to match the output power and/or the frequency response of the hearing aid device to the level of hearing impairment of the patient as precisely as possible. In such cases allowance must be made for the noise level, which is a function of the technology used, to be kept as low as possible and for the signal-to-noise level to be as great as possible. A switching arrangement and/or a hearing aid device and method are provided in which the power amplifier is embodied with at least two output stages. The outputs of the individual output stages can be connected in parallel by means of a controllable switching facility. A simple adjustment of the output power and/or frequency response can be achieved in this way by simply connecting a corresponding number of output stages in parallel.