Abstract: A noise-reducing preamp system includes: a power supply circuit configured to provide electrical power to the noise-reducing preamp system and including a 0 volt reference; a signal amplification circuit including: a preamplifier circuit having an external reference input terminal and configured to receive an analog input signal, and a variable gain controller circuit configured to control the gain of the preamplifier circuit, wherein the signal amplification circuit is configured to amplify the analog input signal to generate an analog amplified signal; and a DC offset and biasing circuit coupled to the preamplifier circuit and the 0 volt reference of the power supply circuit, the DC offset and biasing circuit configured to: receive the 0 volt reference as a feedback signal, process the analog amplified signal to remove a DC offset and generate an analog output signal, and provide the analog output signal to the external reference input terminal of the preamplifier circuit of the signal amplification circuit