Boss understands that amplifiers are placed in many different kinds of installations, so they incorporated a very flexible system of controls to help you integrate the Boss CXX1002 CHAOS EXXTREME 2 Channel Car Stereo Amplifier. Now it’s easier to integrate the amp into your system regardless of the nature of your input source. Features include variable low pass and high pass crossovers and variable input gain controls. For further flexibility when using a subwoofer, 0-18dB Bass Boost remote level control is included.