The STX Audio STX851A Digital Bass Processor is engineered to elevate your car audio experience by restoring and enhancing low-frequency performance. Utilizing a specialized digital bass restoration circuit, it accurately recreates and injects lost low-frequency details back into the audio signal, delivering a fuller and richer bass response from any source, be it CDs, streaming services, or other formats. The processor features two essential controls: the SWEEP knob allows you to select the center frequency between 27Hz and 63Hz, while the WIDE knob adjusts the breadth of the frequency range affected, giving you precise control over your bass tuning to match your vehicle's acoustics and your personal taste. With an impressive frequency response of 10Hz to 35KHz, a signal-to-noise ratio of 133dB, and total harmonic distortion as low as 0.0025%, you can trust that the STX851A will enhance your audio without compromising clarity. The processor includes balanced RCA inputs that accept signals of up to 15V rms, boasting greater than 62dB noise rejection to suppress unwanted engine noise, making it compatible with both factory and aftermarket head units. Plus, the dash mount remote control features an LED indicator for convenient bass level adjustments from your seat, along with a PFM subsonic filter that eliminates inaudible frequencies that waste power and stress your speakers. Designed for easy installation, the STX851A operates efficiently on 12V DC while drawing only 150mA of power, ensuring it can be seamlessly integrated into your existing car audio signal chain.