For those who want the most out of their car audio system, quality sound processing is necessary. Razor DSP amplifiers offer similar sound processing options by including the functions of a Digital Sound Processor. Adjusting the DSP is easy, using an intuitive user interface. After some slight adjustments, your system can sound like audio professionals have tuned it. Connection to the DSP module is possible via USB connection to personal computers or Bluetooth to an available Android & iOS device App. Unlock the best from any system with Razor DSP amplifiers. Are you using an original or factory radio? No problem, these amplifiers are equipped with an Automatic Hi-Level Signal Sensing Turn-On. There is no need to run a remote wire turn on; this amplifier will automatically detect the sound signal and turn on and off the amplifier. (Hi-Level Input only)