Alpine R2-A60F R-Series 4-Channel Amplifier - 150W x 4 at 2-Ohm, Hi-Res Certified - Tried, tested, and true, the Alpine R-Series system has only gotten better over time. With a line-up that’s capable of achieving High-Resolution Playback, without compromising the “Loud and Fun” performance of its heritage, R-Series proves that legends never die. IMPRESSIVE POWER A full amplifier lineup that boasts impressive power, yet compact in size, makes the R-Series amplifiers a powerhouse in performance. Features • High efficiency digital circuit design • Selectable Input Level • Variable High Pass / Low Pass / Band Pass Crossover • Selectable Auto Turn-on with Remote Sensing • Remote Level Control Ready Alpine RUX-H01 Remote Bass Knob for the Alpine Halo Display