Our sensational Fox lineup are 4 channel class a / b amplifiers stable at 2 ohm stereo, and 4 ohm bridget. With extreme quality and efficiency, the GFX-55X4 amplifier is perfect for connections in front and rear speaker system, plus the connection of a subwoofer, enjoy a surround stage, high fidelity, power and efficiency. This is achieved thanks to the electronic parts with which this model has been designed, as well as its high-density heat sink, this gives it a fantastic performance and value in its performance, in addition to its size that adapts to the space of any vehicle, look no further, this is the ideal amp