A multifunction amplifier device for matching an audio signal from an audio signal source, such as a video game, stereo or movie, to a pre-determined frequency of a transducer is disclosed. The amplifier device includes a low pass filter coupled to the audio signal source for developing a filtered signal from the audio signal. A frequency dividing circuit is coupled to the low pass filter for dividing the frequencies of the filtered signal by a pre-determined factor. The amplifier device futher includes a decoding circuit coupled to said low pass filter for selecting between a left and a right audio channel of the filtered signal and developing a decoded signal and a muting circuit coupled to the decoding circuit. The muting circuit only passes the decoded signal at levels above a variable threshold level. A power amplifier is coupled to the frequency dividing circuit and the muting circuit for amplifying the audio signal into an amplified signal having a frequency level corresponding to the pre-determined frequency of the transducer.