Simplify amplifier installation in your Toyota or Lexus vehicle with this Amplifier Integration Interface by PAC. The AP4-TY12 eliminates the need for DSP and summing devices by providing a 6-channel preamp output so you can upgrade your amplifier without modifying the factory radio. This amplifier integration interface retains all audio from factory features and includes plug-and-play connections for easy installation. | Pac | | Amplifier Integration Interface for Select Toyota and Lexus Vehicles | Black/Blue | Best Buy