Boost the performance of your car speakers and turn up the volume with the Prime - R250-4 Amplifier. This 250 watt 4-channel amplifier is capable of running 2-Ohms stereo on all channels and 4-Ohms bridged/mono on the rear channels. If you want a single amplifier that can run your carâ€™s complete audio system, then the Prime R250-4 is perfect for you. It includes on-board Punch Bass and front/rear crossover controls. This amplifier features variable Punch Bass to tune low frequencies, variable crossovers to either protect your high frequency speakers or feeding only bass to your subwoofers, and Pass-Thru jacks for daisy-chaining another amplifier.