Primus amplifier provides true Infinity performance at an affordable price while now including the features needed to properly tune and optimize performance. With it becoming more and more difficult to find spacious locations for amplifier mounting, Primus has been developed in a small compact form factor to allow more location versatility. Primus amplifier has on-board circuitry to protect them from shorts, temperature, overvoltage and undervoltage. An LED indicator is inlcuded on all four models to let you know when one of these conditions exists. Infinity is one of the best selling car audio brands in the world. We take our craft seriously and want every consumer to have a world class experience that lasts and lasts. This provides an available bass boost at 45Hz of 6dB or 12dB, serving as a great tool to optimize subwoofer and loudspeaker performance based on location and enclosure type.