Single loudspeaker drive system and method

A single speaker driver circuit having a low frequency input coil (24) connected between an audio circuit output (12) and the input (18) of the speaker, a low frequency return coil (26), connected between the return (20) of the speaker and the return of the audio signal, the low frequency return coil being bifilar wound with the low frequency input coil, and a higher frequency input coil (28) connected between the audio circuit output and the return of the audio circuit, and a secondary coil (30) connected between the input of the speaker, and ground, the higher frequency input coil and the secondary coil being bifilar wound with one another and the secondary coil acting as the secondary of a transformer. Also disclosed is an audio reproduction system using these circuits, and a method of operating an audio reproduction system to reduce unwanted noise.