Highly acclaimed, the Alpine PDX-M6 monoblock digital amplifier has a host of awards to its credit. Although a Class D amplifier traditionally meant for subwoofers, this Alpine car amplifier has an incredible frequency response of 5 Hz-100 kHz (for 4 channel) and 5 Hz ??? 400 Hz for Mono (+0,-3dB). The monoblock digital amplifier boasts an S/N ratio of up to 95 dB @ 1W, which gives you noise-free, uncolored audio. Due to the very low output impedance of the Alpine car amplifier, the bass is unbelievably clean and crisp. A reliable unit, the Alpine PDX-M6 is equipped with a Thermal Protection circuit that ensures efficient cooling.